a spider for HeTai company to collect info
home page : https://sf.taobao.com/item_list.htm
full url : https://sf.taobao.com/%category%__%sorder%.htm?auction_start_seg=-1&province=&city=&location_code=&sorder=&auction_start_from=&auction_start_to=&page=
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category
- 50025969 -- 房产
- 50025970 -- 土地
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auction_start_seg=-1
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page -- 页码
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sorder
- -1 -- 不限
- 0 -- 正在进行
- 1 -- 即将开始
- 2 -- 已结束
- 3 -- 中止
- 4 -- 撤回
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province = -- 省
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city = -- 市
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location_code = -- 区域代码（从哪获取？）
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auction_start_from=yyyy-mm-dd
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auction_start_to=yyyy-mm-dd