'求购用户', 'Product_id' => '产品', 'Price' => '求购价格', 'Min_price' => '最低求购价格', 'Stock' => '求购数量', 'Num' => '出售数量', 'Total_price' => '总价', 'Status' => '状态', 'Create_time' => '创建时间', 'Update_time' => '更新时间' ];