Wu (traditional Chinese: 吳; simplified Chinese: 吴; pinyin: Wú) refers to a region in China centered on Lake Tai in Jiangnan (the region south of the Yangtze River).

[1] The Wu region was historically part of the ancient Yang Province in southeastern China.

The state of Wu was founded by Taibo and Zhongyong, the first and second son of King Tai of Zhou.

The capital of the Eastern Wu state during the Three Kingdoms period was Nanjing, whose names include Jinling, Jianye and Jiankang.

Go-on (吳音), which is one of the sources of Japanese pronunciation for Chinese characters (the others being kan-on, tō-on and kan'yō-on), was Jinling Standard Pronunciation, the standard Chinese of time that spread to Japan during Southern dynasties.