《周礼·冬官考工记·磬氏&车人》
凡开沟渠违逆地的脉理，叫做水流不行；水的流注不顺，也叫水流不行。
凡沟逆地阞谓之不行。水属不理孙，谓之不行。
The water channel that goes against the earth's veins is called shuiliubuxing; the water's flow is not smooth is also called shuiliubuxing.