purchase_order_id, purchase_order_title, purchase_order_time, purchase_order_amount, purchase_order_state, purchase_order_approval_state, purchase_order_files, purchase_order_description, category_id, purchase_order_quantity, purchase_order_unit, buyer_user_id, buyer_user_name, supply_user_id, supply_user_name, purchase_province, purchase_city, purchase_county, purchase_province_id, purchase_city_id, purchase_county_id, origin_place_id, purchase_deadline, purchase_payment_time, purchase_is_check, purchase_is_trusteeship, purchase_task_state, purchase_mode_id, purchase_tender_discount, purchase_tender_endtime, purchase_complete_time, purchase_buyer_evaluation_status, purchase_supply_evaluation_status, purchase_commission_fee, purchase_product_spec, application_user_ids, purchase_verify_reason, purchase_product_images