"With a good sewage management system and vigilant enforcement of the law," wrote Zhou Baozhu in his book on Song Dynasty Bianjing, "the city often had floods, but they were not disastrous."
「正因為有了較好的排水管理制度，並能認真執行，所以京師雖屢遇大水，都能化險為夷」，《宋代東京研究》一書作者周寶珠指出。