厕所蹲坑

http://m.xinhuanet.com/sd/2018-11/19/c_1123735697.htm

https://zh.wikipedia.org/wiki/%E8%B9%B2%E5%BB%81

https://zh.wikipedia.org/zh-hans/%E8%B9%B2%E5%BB%81

https://www.sohu.com/a/668869460_99981830

https://www.reddit.com/r/China_irl/comments/r5hbrh/%E5%90%84%E4%BD%8D%E5%A6%82%E4%BD%95%E7%9C%8B%E5%BE%85%E5%85%AC%E5%85%B1%E5%8E%95%E6%89%80%E8%B9%B2%E5%9D%91%E5%92%8C%E5%9D%90%E4%BE%BF%E5%99%A8/

https://m.21jingji.com/article/20191101/herald/b1f34d33a50a6af3d6f1112c9572bec4.html

https://m.36kr.com/p/1658732309330057

https://m.huanqiu.com/article/9CaKrnKeeFl

https://patents.google.com/patent/CN1775158A/zh