Wu Collection, Lower Volume Radical: Cave (xué) Kangxi Strokes: 20 Page 869, Entry 18 Guangyun: Pronounced dou Jiyun, Yunhui, Zhengyun: Pronounced dou Shuowen Jiezi: To be empty. Book of Rites (Liji), Monthly Ordinances (Yueling): To bore through a cellar or pit. Commentary: A hole into the ground is called a dou. Boring a hole through a wall is also called a dou. Zuo Tradition (Zuozhuan), Tenth Year of Duke Xiang: The steward of Wangshu said: People of the wicker gate and jade-shaped aperture. Commentary: A dou is a small door made by piercing a wall. Also, a hole. Book of Rites (Liji), Evolution of Rites (Liyun): Rites and righteousness are the great openings that follow human sentiment. Commentary: A dou is a hole or aperture. Also, a water channel. Zuo Tradition (Zuozhuan), Twenty-Sixth Year of Duke Xiang: Wu Yu of Qi attacked us, and Gao Yu had heavy rain, which entered from its channel. Commentary: Because of the rain, the water channels opened. Also, to breach. Discourses of Zhou (Zhouyu): Do not breach the marshes. Commentary: A dou is a breach. Also, a place name. Zuo Tradition (Zuozhuan), Ninth Year of Duke Zhuang: Killed Ziji at Shengdou. Commentary: Shengdou is a location in the state of Lu. History of Northern Dynasties (Beishi), Annals of Northern Wei: In the seventh year of Taichang, the emperor traveled west from Yunzhong to Wudou City. Commentary on the Water Classic (Shuijingzhu): Emperor Wu of Han traveled incognito to Bogu and encountered an insult at the dou gate. He was moved by his wife's deep understanding and rewarded her with the position of river ferry supervisor. Her ferry business is what is known today as Doujin. Also, a surname. Comprehensive Customs (Fengsutong): During the disaster caused by the Youqiong clan, the wife of Xiahou Xiang was pregnant and fled out through a dou, giving birth to Shaokang; her descendants took it as a surname. During the Han dynasty, there was Dou Ying, Marquis of Weiqi. Also, commonly written as yu. Book of Rites (Liji), Conduct of Scholars (Ruxing): Wicker gate and jade-shaped aperture. Explanation of Texts (Shiwen): Pronounced dou. Jiyun, Zhengyun: Pronounced du. Interchangeable with du (ditch or drain). Book of Rites (Liji) Commentary: The western dou of the Five Sacred Peaks.