diff --git a/cmake/external/snappystream.cmake b/cmake/external/snappystream.cmake
index 5377a0b046a79..8f7a3bf8eeaef 100644
--- a/cmake/external/snappystream.cmake
+++ b/cmake/external/snappystream.cmake
@@ -54,5 +54,7 @@ add_library(snappystream STATIC IMPORTED GLOBAL)
 set_property(TARGET snappystream PROPERTY IMPORTED_LOCATION
         "${SNAPPYSTREAM_INSTALL_DIR}/lib/libsnappystream.a")
 
-include_directories(${SNAPPYSTREAM_INCLUDE_DIR})
+include_directories(${SNAPPYSTREAM_INCLUDE_DIR}) # For snappysteam to include its own headers.
+include_directories(${THIRD_PARTY_PATH}/install) # For Paddle to include snappy stream headers.
+
 add_dependencies(snappystream extern_snappystream)
diff --git a/cmake/external/zlib.cmake b/cmake/external/zlib.cmake
index 20b8506e678af..c3d73235453c8 100644
--- a/cmake/external/zlib.cmake
+++ b/cmake/external/zlib.cmake
@@ -25,7 +25,8 @@ ELSE(WIN32)
   SET(ZLIB_LIBRARIES "${ZLIB_INSTALL_DIR}/lib/libz.a" CACHE FILEPATH "zlib library." FORCE)
 ENDIF(WIN32)
 
-INCLUDE_DIRECTORIES(${ZLIB_INCLUDE_DIR})
+INCLUDE_DIRECTORIES(${ZLIB_INCLUDE_DIR}) # For zlib code to include its own headers.
+INCLUDE_DIRECTORIES(${THIRD_PARTY_PATH}/install) # For Paddle code to include zlib.h.
 
 ExternalProject_Add(
     extern_zlib
diff --git a/paddle/fluid/framework/.clang-format b/paddle/fluid/.clang-format
similarity index 100%
rename from paddle/fluid/framework/.clang-format
rename to paddle/fluid/.clang-format
diff --git a/paddle/fluid/inference/io.cc b/paddle/fluid/inference/io.cc
index 52e9c0baa6450..a5b62ef322bfa 100644
--- a/paddle/fluid/inference/io.cc
+++ b/paddle/fluid/inference/io.cc
@@ -41,8 +41,7 @@ bool IsPersistable(const framework::VarDesc* var) {
   return false;
 }
 
-void LoadPersistables(framework::Executor& executor,
-                      framework::Scope& scope,
+void LoadPersistables(framework::Executor& executor, framework::Scope& scope,
                       const framework::ProgramDesc& main_program,
                       const std::string& dirname,
                       const std::string& param_filename) {
@@ -108,10 +107,8 @@ std::unique_ptr<framework::ProgramDesc> Load(framework::Executor& executor,
 }
 
 std::unique_ptr<framework::ProgramDesc> Load(
-    framework::Executor& executor,
-    framework::Scope& scope,
-    const std::string& prog_filename,
-    const std::string& param_filename) {
+    framework::Executor& executor, framework::Scope& scope,
+    const std::string& prog_filename, const std::string& param_filename) {
   std::string model_filename = prog_filename;
   std::string program_desc_str;
   ReadBinaryFile(model_filename, program_desc_str);
diff --git a/paddle/fluid/inference/io.h b/paddle/fluid/inference/io.h
index 6817a6fca047c..d07d315b93ef1 100644
--- a/paddle/fluid/inference/io.h
+++ b/paddle/fluid/inference/io.h
@@ -24,8 +24,7 @@ limitations under the License. */
 namespace paddle {
 namespace inference {
 
-void LoadPersistables(framework::Executor& executor,
-                      framework::Scope& scope,
+void LoadPersistables(framework::Executor& executor, framework::Scope& scope,
                       const framework::ProgramDesc& main_program,
                       const std::string& dirname,
                       const std::string& param_filename);
diff --git a/paddle/fluid/inference/tests/book/test_inference_fit_a_line.cc b/paddle/fluid/inference/tests/book/test_inference_fit_a_line.cc
index 9ab808efec3ab..8d8365a8396e2 100644
--- a/paddle/fluid/inference/tests/book/test_inference_fit_a_line.cc
+++ b/paddle/fluid/inference/tests/book/test_inference_fit_a_line.cc
@@ -30,8 +30,8 @@ TEST(inference, fit_a_line) {
   // The second dim of the input tensor should be 13
   // The input data should be >= 0
   int64_t batch_size = 10;
-  SetupTensor<float>(
-      input, {batch_size, 13}, static_cast<float>(0), static_cast<float>(10));
+  SetupTensor<float>(input, {batch_size, 13}, static_cast<float>(0),
+                     static_cast<float>(10));
   std::vector<paddle::framework::LoDTensor*> cpu_feeds;
   cpu_feeds.push_back(&input);
 
diff --git a/paddle/fluid/inference/tests/book/test_inference_image_classification.cc b/paddle/fluid/inference/tests/book/test_inference_image_classification.cc
index e9a27171f1cd6..954ca7a3e384e 100644
--- a/paddle/fluid/inference/tests/book/test_inference_image_classification.cc
+++ b/paddle/fluid/inference/tests/book/test_inference_image_classification.cc
@@ -35,10 +35,8 @@ TEST(inference, image_classification) {
   paddle::framework::LoDTensor input;
   // Use normilized image pixels as input data,
   // which should be in the range [0.0, 1.0].
-  SetupTensor<float>(input,
-                     {FLAGS_batch_size, 3, 32, 32},
-                     static_cast<float>(0),
-                     static_cast<float>(1));
+  SetupTensor<float>(input, {FLAGS_batch_size, 3, 32, 32},
+                     static_cast<float>(0), static_cast<float>(1));
   std::vector<paddle::framework::LoDTensor*> cpu_feeds;
   cpu_feeds.push_back(&input);
 
@@ -48,8 +46,8 @@ TEST(inference, image_classification) {
 
   // Run inference on CPU
   LOG(INFO) << "--- CPU Runs: ---";
-  TestInference<paddle::platform::CPUPlace>(
-      dirname, cpu_feeds, cpu_fetchs1, FLAGS_repeat);
+  TestInference<paddle::platform::CPUPlace>(dirname, cpu_feeds, cpu_fetchs1,
+                                            FLAGS_repeat);
   LOG(INFO) << output1.dims();
 
 #ifdef PADDLE_WITH_CUDA
@@ -59,8 +57,8 @@ TEST(inference, image_classification) {
 
   // Run inference on CUDA GPU
   LOG(INFO) << "--- GPU Runs: ---";
-  TestInference<paddle::platform::CUDAPlace>(
-      dirname, cpu_feeds, cpu_fetchs2, FLAGS_repeat);
+  TestInference<paddle::platform::CUDAPlace>(dirname, cpu_feeds, cpu_fetchs2,
+                                             FLAGS_repeat);
   LOG(INFO) << output2.dims();
 
   CheckError<float>(output1, output2);
diff --git a/paddle/fluid/inference/tests/book/test_inference_label_semantic_roles.cc b/paddle/fluid/inference/tests/book/test_inference_label_semantic_roles.cc
index 184924016634b..31100494ffc55 100644
--- a/paddle/fluid/inference/tests/book/test_inference_label_semantic_roles.cc
+++ b/paddle/fluid/inference/tests/book/test_inference_label_semantic_roles.cc
@@ -36,37 +36,21 @@ TEST(inference, label_semantic_roles) {
   int64_t predicate_dict_len = 3162;
   int64_t mark_dict_len = 2;
 
-  SetupLoDTensor(word,
-                 lod,
-                 static_cast<int64_t>(0),
+  SetupLoDTensor(word, lod, static_cast<int64_t>(0),
                  static_cast<int64_t>(word_dict_len - 1));
-  SetupLoDTensor(predicate,
-                 lod,
-                 static_cast<int64_t>(0),
+  SetupLoDTensor(predicate, lod, static_cast<int64_t>(0),
                  static_cast<int64_t>(predicate_dict_len - 1));
-  SetupLoDTensor(ctx_n2,
-                 lod,
-                 static_cast<int64_t>(0),
+  SetupLoDTensor(ctx_n2, lod, static_cast<int64_t>(0),
                  static_cast<int64_t>(word_dict_len - 1));
-  SetupLoDTensor(ctx_n1,
-                 lod,
-                 static_cast<int64_t>(0),
+  SetupLoDTensor(ctx_n1, lod, static_cast<int64_t>(0),
                  static_cast<int64_t>(word_dict_len - 1));
-  SetupLoDTensor(ctx_0,
-                 lod,
-                 static_cast<int64_t>(0),
+  SetupLoDTensor(ctx_0, lod, static_cast<int64_t>(0),
                  static_cast<int64_t>(word_dict_len - 1));
-  SetupLoDTensor(ctx_p1,
-                 lod,
-                 static_cast<int64_t>(0),
+  SetupLoDTensor(ctx_p1, lod, static_cast<int64_t>(0),
                  static_cast<int64_t>(word_dict_len - 1));
-  SetupLoDTensor(ctx_p2,
-                 lod,
-                 static_cast<int64_t>(0),
+  SetupLoDTensor(ctx_p2, lod, static_cast<int64_t>(0),
                  static_cast<int64_t>(word_dict_len - 1));
-  SetupLoDTensor(mark,
-                 lod,
-                 static_cast<int64_t>(0),
+  SetupLoDTensor(mark, lod, static_cast<int64_t>(0),
                  static_cast<int64_t>(mark_dict_len - 1));
 
   std::vector<paddle::framework::LoDTensor*> cpu_feeds;
diff --git a/paddle/fluid/inference/tests/book/test_inference_recognize_digits.cc b/paddle/fluid/inference/tests/book/test_inference_recognize_digits.cc
index 1fb0f9e77797c..82275d3ee11de 100644
--- a/paddle/fluid/inference/tests/book/test_inference_recognize_digits.cc
+++ b/paddle/fluid/inference/tests/book/test_inference_recognize_digits.cc
@@ -35,10 +35,8 @@ TEST(inference, recognize_digits) {
   paddle::framework::LoDTensor input;
   // Use normilized image pixels as input data,
   // which should be in the range [-1.0, 1.0].
-  SetupTensor<float>(input,
-                     {FLAGS_batch_size, 1, 28, 28},
-                     static_cast<float>(-1),
-                     static_cast<float>(1));
+  SetupTensor<float>(input, {FLAGS_batch_size, 1, 28, 28},
+                     static_cast<float>(-1), static_cast<float>(1));
   std::vector<paddle::framework::LoDTensor*> cpu_feeds;
   cpu_feeds.push_back(&input);
 
@@ -49,8 +47,8 @@ TEST(inference, recognize_digits) {
 
     // Run inference on CPU
     LOG(INFO) << "--- CPU Runs: is_combined=" << is_combined << " ---";
-    TestInference<paddle::platform::CPUPlace>(
-        dirname, cpu_feeds, cpu_fetchs1, FLAGS_repeat, is_combined);
+    TestInference<paddle::platform::CPUPlace>(dirname, cpu_feeds, cpu_fetchs1,
+                                              FLAGS_repeat, is_combined);
     LOG(INFO) << output1.dims();
 
 #ifdef PADDLE_WITH_CUDA
@@ -60,8 +58,8 @@ TEST(inference, recognize_digits) {
 
     // Run inference on CUDA GPU
     LOG(INFO) << "--- GPU Runs: is_combined=" << is_combined << " ---";
-    TestInference<paddle::platform::CUDAPlace>(
-        dirname, cpu_feeds, cpu_fetchs2, FLAGS_repeat, is_combined);
+    TestInference<paddle::platform::CUDAPlace>(dirname, cpu_feeds, cpu_fetchs2,
+                                               FLAGS_repeat, is_combined);
     LOG(INFO) << output2.dims();
 
     CheckError<float>(output1, output2);
diff --git a/paddle/fluid/inference/tests/book/test_inference_rnn_encoder_decoder.cc b/paddle/fluid/inference/tests/book/test_inference_rnn_encoder_decoder.cc
index a0523905bd163..ea2d5ee092a04 100644
--- a/paddle/fluid/inference/tests/book/test_inference_rnn_encoder_decoder.cc
+++ b/paddle/fluid/inference/tests/book/test_inference_rnn_encoder_decoder.cc
@@ -32,10 +32,10 @@ TEST(inference, rnn_encoder_decoder) {
   paddle::framework::LoDTensor word_data, trg_word;
   paddle::framework::LoD lod{{0, 4, 10}};
 
-  SetupLoDTensor(
-      word_data, lod, static_cast<int64_t>(0), static_cast<int64_t>(1));
-  SetupLoDTensor(
-      trg_word, lod, static_cast<int64_t>(0), static_cast<int64_t>(1));
+  SetupLoDTensor(word_data, lod, static_cast<int64_t>(0),
+                 static_cast<int64_t>(1));
+  SetupLoDTensor(trg_word, lod, static_cast<int64_t>(0),
+                 static_cast<int64_t>(1));
 
   std::vector<paddle::framework::LoDTensor*> cpu_feeds;
   cpu_feeds.push_back(&word_data);
diff --git a/paddle/fluid/inference/tests/book/test_inference_understand_sentiment.cc b/paddle/fluid/inference/tests/book/test_inference_understand_sentiment.cc
index 824b3274ebc7b..21ffd8d3682d4 100644
--- a/paddle/fluid/inference/tests/book/test_inference_understand_sentiment.cc
+++ b/paddle/fluid/inference/tests/book/test_inference_understand_sentiment.cc
@@ -33,9 +33,7 @@ TEST(inference, understand_sentiment) {
   paddle::framework::LoD lod{{0, 4, 10}};
   int64_t word_dict_len = 5147;
 
-  SetupLoDTensor(words,
-                 lod,
-                 static_cast<int64_t>(0),
+  SetupLoDTensor(words, lod, static_cast<int64_t>(0),
                  static_cast<int64_t>(word_dict_len - 1));
 
   std::vector<paddle::framework::LoDTensor*> cpu_feeds;
diff --git a/paddle/fluid/inference/tests/test_helper.h b/paddle/fluid/inference/tests/test_helper.h
index dce541c0971a6..d8ffedf672692 100644
--- a/paddle/fluid/inference/tests/test_helper.h
+++ b/paddle/fluid/inference/tests/test_helper.h
@@ -19,9 +19,7 @@ limitations under the License. */
 
 template <typename T>
 void SetupTensor(paddle::framework::LoDTensor& input,
-                 paddle::framework::DDim dims,
-                 T lower,
-                 T upper) {
+                 paddle::framework::DDim dims, T lower, T upper) {
   srand(time(0));
   T* input_ptr = input.mutable_data<T>(dims, paddle::platform::CPUPlace());
   for (int i = 0; i < input.numel(); ++i) {
@@ -33,8 +31,7 @@ void SetupTensor(paddle::framework::LoDTensor& input,
 
 template <typename T>
 void SetupTensor(paddle::framework::LoDTensor& input,
-                 paddle::framework::DDim dims,
-                 std::vector<T>& data) {
+                 paddle::framework::DDim dims, std::vector<T>& data) {
   CHECK_EQ(paddle::framework::product(dims), static_cast<int64_t>(data.size()));
   T* input_ptr = input.mutable_data<T>(dims, paddle::platform::CPUPlace());
   memcpy(input_ptr, data.data(), input.numel() * sizeof(T));
@@ -42,9 +39,7 @@ void SetupTensor(paddle::framework::LoDTensor& input,
 
 template <typename T>
 void SetupLoDTensor(paddle::framework::LoDTensor& input,
-                    paddle::framework::LoD& lod,
-                    T lower,
-                    T upper) {
+                    paddle::framework::LoD& lod, T lower, T upper) {
   input.set_lod(lod);
   int dim = lod[0][lod[0].size() - 1];
   SetupTensor<T>(input, {dim, 1}, lower, upper);
@@ -52,8 +47,7 @@ void SetupLoDTensor(paddle::framework::LoDTensor& input,
 
 template <typename T>
 void SetupLoDTensor(paddle::framework::LoDTensor& input,
-                    paddle::framework::DDim dims,
-                    paddle::framework::LoD lod,
+                    paddle::framework::DDim dims, paddle::framework::LoD lod,
                     std::vector<T>& data) {
   const size_t level = lod.size() - 1;
   CHECK_EQ(dims[0], static_cast<int64_t>((lod[level]).back()));
@@ -92,8 +86,7 @@ template <typename Place>
 void TestInference(const std::string& dirname,
                    const std::vector<paddle::framework::LoDTensor*>& cpu_feeds,
                    std::vector<paddle::framework::LoDTensor*>& cpu_fetchs,
-                   const int repeat = 1,
-                   const bool is_combined = false) {
+                   const int repeat = 1, const bool is_combined = false) {
   // 1. Define place, executor, scope
   auto place = Place();
   auto executor = paddle::framework::Executor(place);
@@ -132,11 +125,9 @@ void TestInference(const std::string& dirname,
       //  `fluid.io.save_inference_model`.
       std::string prog_filename = "__model_combined__";
       std::string param_filename = "__params_combined__";
-      inference_program =
-          paddle::inference::Load(executor,
-                                  *scope,
-                                  dirname + "/" + prog_filename,
-                                  dirname + "/" + param_filename);
+      inference_program = paddle::inference::Load(
+          executor, *scope, dirname + "/" + prog_filename,
+          dirname + "/" + param_filename);
     } else {
       // Parameters are saved in separate files sited in the specified
       // `dirname`.
diff --git a/paddle/fluid/memory/.clang-format b/paddle/fluid/memory/.clang-format
deleted file mode 100644
index 29282dc87e2c4..0000000000000
--- a/paddle/fluid/memory/.clang-format
+++ /dev/null
@@ -1,5 +0,0 @@
----
-Language:        Cpp
-BasedOnStyle:  Google
-Standard:  Cpp11 
-...
diff --git a/paddle/fluid/operators/.clang-format b/paddle/fluid/operators/.clang-format
deleted file mode 100644
index 29282dc87e2c4..0000000000000
--- a/paddle/fluid/operators/.clang-format
+++ /dev/null
@@ -1,5 +0,0 @@
----
-Language:        Cpp
-BasedOnStyle:  Google
-Standard:  Cpp11 
-...
diff --git a/paddle/fluid/platform/.clang-format b/paddle/fluid/platform/.clang-format
deleted file mode 100644
index 29282dc87e2c4..0000000000000
--- a/paddle/fluid/platform/.clang-format
+++ /dev/null
@@ -1,5 +0,0 @@
----
-Language:        Cpp
-BasedOnStyle:  Google
-Standard:  Cpp11 
-...
diff --git a/paddle/fluid/pybind/.clang-format b/paddle/fluid/pybind/.clang-format
deleted file mode 100644
index 29282dc87e2c4..0000000000000
--- a/paddle/fluid/pybind/.clang-format
+++ /dev/null
@@ -1,5 +0,0 @@
----
-Language:        Cpp
-BasedOnStyle:  Google
-Standard:  Cpp11 
-...
diff --git a/paddle/fluid/recordio/chunk.cc b/paddle/fluid/recordio/chunk.cc
index 187a6a4ea7bd9..e7ebbba452c5c 100644
--- a/paddle/fluid/recordio/chunk.cc
+++ b/paddle/fluid/recordio/chunk.cc
@@ -14,11 +14,13 @@
 
 #include "paddle/fluid/recordio/chunk.h"
 
+#include <algorithm>
 #include <memory>
 #include <sstream>
+
 #include "paddle/fluid/platform/enforce.h"
-#include "snappystream.hpp"
-#include "zlib.h"
+#include "snappy_stream/include/snappystream.hpp"
+#include "zlib/include/zlib.h"
 
 namespace paddle {
 namespace recordio {
@@ -58,8 +60,8 @@ static void ReadStreamByBuf(std::istream& in, size_t limit, Callback callback) {
  * Copy stream in to another stream
  */
 static void PipeStream(std::istream& in, std::ostream& os) {
-  ReadStreamByBuf(
-      in, 0, [&os](const char* buf, size_t len) { os.write(buf, len); });
+  ReadStreamByBuf(in, 0,
+                  [&os](const char* buf, size_t len) { os.write(buf, len); });
 }
 
 /**
@@ -68,8 +70,8 @@ static void PipeStream(std::istream& in, std::ostream& os) {
 static uint32_t Crc32Stream(std::istream& in, size_t limit = 0) {
   uint32_t crc = static_cast<uint32_t>(crc32(0, nullptr, 0));
   ReadStreamByBuf(in, limit, [&crc](const char* buf, size_t len) {
-    crc = static_cast<uint32_t>(crc32(
-        crc, reinterpret_cast<const Bytef*>(buf), static_cast<uInt>(len)));
+    crc = static_cast<uint32_t>(crc32(crc, reinterpret_cast<const Bytef*>(buf),
+                                      static_cast<uInt>(len)));
   });
   return crc;
 }
diff --git a/paddle/fluid/recordio/chunk.h b/paddle/fluid/recordio/chunk.h
index bf20ebd455c26..71a1556a33bfa 100644
--- a/paddle/fluid/recordio/chunk.h
+++ b/paddle/fluid/recordio/chunk.h
@@ -24,7 +24,7 @@ namespace recordio {
 
 // A Chunk contains the Header and optionally compressed records.
 class Chunk {
-public:
+ public:
   Chunk() : num_bytes_(0) {}
   void Add(const std::string& buf) {
     num_bytes_ += buf.size();
@@ -46,7 +46,7 @@ class Chunk {
 
   bool Empty() const { return records_.empty(); }
 
-private:
+ private:
   std::vector<std::string> records_;
   // sum of record lengths in bytes.
   size_t num_bytes_;
diff --git a/paddle/fluid/recordio/chunk_test.cc b/paddle/fluid/recordio/chunk_test.cc
index 1f0e36a14d373..98ca99b9a018d 100644
--- a/paddle/fluid/recordio/chunk_test.cc
+++ b/paddle/fluid/recordio/chunk_test.cc
@@ -18,29 +18,27 @@
 
 #include "gtest/gtest.h"
 
-using namespace paddle::recordio;
-
 TEST(Chunk, SaveLoad) {
-  Chunk ch;
+  paddle::recordio::Chunk ch;
   ch.Add(std::string("12345", 6));
   ch.Add(std::string("123", 4));
   std::stringstream ss;
-  ch.Write(ss, Compressor::kNoCompress);
+  ch.Write(ss, paddle::recordio::Compressor::kNoCompress);
   ss.seekg(0);
   ch.Parse(ss);
   ASSERT_EQ(ch.NumBytes(), 10U);
 }
 
 TEST(Chunk, Compressor) {
-  Chunk ch;
+  paddle::recordio::Chunk ch;
   ch.Add(std::string("12345", 6));
   ch.Add(std::string("123", 4));
   ch.Add(std::string("123", 4));
   ch.Add(std::string("123", 4));
   std::stringstream ss;
-  ch.Write(ss, Compressor::kSnappy);
+  ch.Write(ss, paddle::recordio::Compressor::kSnappy);
   std::stringstream ss2;
-  ch.Write(ss2, Compressor::kNoCompress);
+  ch.Write(ss2, paddle::recordio::Compressor::kNoCompress);
   ASSERT_LE(ss.tellp(), ss2.tellp());  // Compress should contain less data;
 
   ch.Clear();
diff --git a/paddle/fluid/recordio/header.h b/paddle/fluid/recordio/header.h
index 9200ac090de45..245425990b93a 100644
--- a/paddle/fluid/recordio/header.h
+++ b/paddle/fluid/recordio/header.h
@@ -37,7 +37,7 @@ enum class Compressor : uint32_t {
 
 // Header is the metadata of Chunk
 class Header {
-public:
+ public:
   Header();
   Header(uint32_t num, uint32_t sum, Compressor ct, uint32_t cs);
 
@@ -51,7 +51,7 @@ class Header {
   Compressor CompressType() const { return compressor_; }
   uint32_t CompressSize() const { return compress_size_; }
 
-private:
+ private:
   uint32_t num_records_;
   uint32_t checksum_;
   Compressor compressor_;
diff --git a/paddle/fluid/recordio/header_test.cc b/paddle/fluid/recordio/header_test.cc
index a7d627c3eb4a7..00f1887dc5e11 100644
--- a/paddle/fluid/recordio/header_test.cc
+++ b/paddle/fluid/recordio/header_test.cc
@@ -18,14 +18,12 @@
 
 #include "gtest/gtest.h"
 
-using namespace paddle::recordio;
-
 TEST(Recordio, ChunkHead) {
-  Header hdr(0, 1, Compressor::kGzip, 3);
+  paddle::recordio::Header hdr(0, 1, paddle::recordio::Compressor::kGzip, 3);
   std::stringstream ss;
   hdr.Write(ss);
   ss.seekg(0, std::ios::beg);
-  Header hdr2;
+  paddle::recordio::Header hdr2;
   hdr2.Parse(ss);
   EXPECT_TRUE(hdr == hdr2);
 }
diff --git a/paddle/fluid/recordio/scanner.cc b/paddle/fluid/recordio/scanner.cc
index c22281dc97e05..88b4d4001bc1b 100644
--- a/paddle/fluid/recordio/scanner.cc
+++ b/paddle/fluid/recordio/scanner.cc
@@ -13,10 +13,14 @@
 // limitations under the License.
 
 #include "paddle/fluid/recordio/scanner.h"
+
+#include <string>
+
 #include "paddle/fluid/platform/enforce.h"
 
 namespace paddle {
 namespace recordio {
+
 Scanner::Scanner(std::unique_ptr<std::istream> &&stream)
     : stream_(std::move(stream)) {
   Reset();
diff --git a/paddle/fluid/recordio/scanner.h b/paddle/fluid/recordio/scanner.h
index f3f17b69f195d..34f1b0c78d6b5 100644
--- a/paddle/fluid/recordio/scanner.h
+++ b/paddle/fluid/recordio/scanner.h
@@ -16,12 +16,15 @@
 
 #include <fstream>
 #include <memory>
+#include <string>
+
 #include "paddle/fluid/recordio/chunk.h"
+
 namespace paddle {
 namespace recordio {
 
 class Scanner {
-public:
+ public:
   explicit Scanner(std::unique_ptr<std::istream>&& stream);
 
   explicit Scanner(const std::string& filename);
@@ -32,7 +35,7 @@ class Scanner {
 
   bool HasNext() const;
 
-private:
+ private:
   std::unique_ptr<std::istream> stream_;
   Chunk cur_chunk_;
   size_t offset_;
diff --git a/paddle/fluid/recordio/writer.cc b/paddle/fluid/recordio/writer.cc
index 196d66edff8cc..8046f4ff7896c 100644
--- a/paddle/fluid/recordio/writer.cc
+++ b/paddle/fluid/recordio/writer.cc
@@ -12,9 +12,14 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 #include "paddle/fluid/recordio/writer.h"
+
+#include <string>
+
 #include "paddle/fluid/platform/enforce.h"
+
 namespace paddle {
 namespace recordio {
+
 void Writer::Write(const std::string& record) {
   cur_chunk_.Add(record);
   if (cur_chunk_.NumRecords() >= max_num_records_in_chunk_) {
diff --git a/paddle/fluid/recordio/writer.h b/paddle/fluid/recordio/writer.h
index 0c478d507547b..ac7e50ee90e6e 100644
--- a/paddle/fluid/recordio/writer.h
+++ b/paddle/fluid/recordio/writer.h
@@ -11,16 +11,17 @@
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.
-
 #pragma once
+
+#include <string>
+
 #include "paddle/fluid/recordio/chunk.h"
 namespace paddle {
 namespace recordio {
 
 class Writer {
-public:
-  Writer(std::ostream* sout,
-         Compressor compressor,
+ public:
+  Writer(std::ostream* sout, Compressor compressor,
          size_t max_num_records_in_chunk = 1000)
       : stream_(*sout),
         max_num_records_in_chunk_(max_num_records_in_chunk),
@@ -32,7 +33,7 @@ class Writer {
 
   ~Writer();
 
-private:
+ private:
   std::ostream& stream_;
   size_t max_num_records_in_chunk_;
   Chunk cur_chunk_;
diff --git a/paddle/fluid/recordio/writer_scanner_test.cc b/paddle/fluid/recordio/writer_scanner_test.cc
index 7e764f0d94397..6583df21a20e9 100644
--- a/paddle/fluid/recordio/writer_scanner_test.cc
+++ b/paddle/fluid/recordio/writer_scanner_test.cc
@@ -12,9 +12,10 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#include "gtest/gtest.h"
-
 #include <sstream>
+#include <string>
+
+#include "gtest/gtest.h"
 #include "paddle/fluid/recordio/scanner.h"
 #include "paddle/fluid/recordio/writer.h"
 
@@ -66,4 +67,4 @@ TEST(WriterScanner, TinyChunk) {
     ASSERT_EQ(scanner.Next(), "DEFG");
     ASSERT_FALSE(scanner.HasNext());
   }
-}
\ No newline at end of file
+}
diff --git a/paddle/fluid/string/.clang-format b/paddle/fluid/string/.clang-format
deleted file mode 120000
index 7d28cb3924707..0000000000000
--- a/paddle/fluid/string/.clang-format
+++ /dev/null
@@ -1 +0,0 @@
-../framework/.clang-format
\ No newline at end of file