From which dynasty did Hunan's status as a land of fish and rice begin to be established? (Hanshu Qin Song Tang). Please send me the link of the answer, thank you.

In the Han Dynasty, that chassis was Jingzhou. In the Tang Dynasty, despite the Grand Canal, most of the grain was transported in Taihu Lake and Suzhou-Hangzhou areas in the southeast of the Yangtze River. So rule out Qin, Han and Tang dynasties.

"Suzhou and Shanghai are ripe, and the world is full" is a folk proverb in the Southern Song Dynasty.

—— (The following is from online search).

During the Ming and Qing Dynasties, Jiangsu and Zhejiang rural areas switched to planting cotton and became the center of the national cotton textile industry. Jiangsu and Zhejiang cannot be self-sufficient in grain and need to import from Huguang. The proverb "Suzhou and Shanghai are ripe, and the world is full" has evolved into the proverb "Hunan is ripe, and Hunan's grain output has increased greatly". The amount of grain shipped out of Hunan in the Ming Dynasty was quite large, such as 1429 (Xuande four years). The method of multiple transportation has enabled people from Jiangxi, Huguang and Zhejiang to transport 2.2 million stone grain to Huai 'an warehouse. 1472 (the eighth year of Chenghua), it was decided that the grain in Beijing was * * * 4 million stones, of which Huguang and Jiangxi "Southern Grain" were more than 3.24 million stones, accounting for the vast majority. By the late Ming dynasty, the grain in the lower reaches of the Yangtze River was mostly supplied by Huguang and other places. For example, Anhui Huizhou grain "takes more rice from Jiangxi and Huguang as food".