When did the word "Jiangnan" appear?

The word Jiangnan was first seen in Zuo Gong's third year (about 400 BC), Wang Yitian's Dream of Jiangnan (now Qianjiang, Hubei Province), and the last sentence of Chu Ci in the Warring States Period, "The soul is mourning for Jiangnan". The original authors are Qu Yuan and Song Yu. Although The Spring and Autumn Annals of Wu Yue tells the story of wuyue Gou Jian in the Spring and Autumn Period, it was written by Zhao Ye, a scholar in the Eastern Han Dynasty, about 300 years later than Evocation of Songs of the South. Qu Yuan wrote "Chu Ci Evocation", saying that he missed Chu Huaiwang and said that Qu Yuan evokes the soul for himself; Song Yu wrote about Qu Yuan. Neither has anything to do with wuyue. Therefore, Jiangnan refers to the area south of the Yangtze River in ancient Chu, that is, the area south of the Yangtze River in Hunan, Hubei and Jiangxi, which is also consistent with the location of the three famous buildings in Jiangnan. Wuyue, formerly known as Jiangdong, was destroyed by Chu in Chu Huaiwang period.