During the Five Dynasties and Ten Kingdoms period, Zhu Wen, the great ancestor of Hou Liang, opened a "map returning service" in Xiangyang, exchanging horses from the north for tea and other commodities. ?

Tea tax was the main tax source of Chu at that time, so the government collected "millions" every year. In order to promote the production and trade of tea, Machu Picchu regime adopted a loose policy of "making people make their own tea" and "listening to people sell tea to the north", allowing people to make their own tea "to facilitate business travel". At the same time, the Machu regime set up commercial warehouses all over the country, and organized merchants ("eight-bed owners" of tea shops) to buy tea and sell it to merchants in the Central Plains in exchange for war horses and silk goods.

Lu You's Biography of Qidan in the Southern Tang Dynasty mentioned many times that King Qidan sent envoys to the Southern Tang Dynasty to exchange sheep and horses for Luo, tea and medicine. According to "Zi Jian", "Judge Gao Yu of Hunan, please listen to the people picking their own tea, selling it to them and collecting it to support the army. Yin followed closely. In autumn and July, Yin played in Bian, Jing, Xiang, Tang, Ying and Fu, returned to Tufu, transported tea to northern Henan, sold it to Yi, and returned by horse. He was still 250 thousand Jin of tea, which was promised by a letter. ……."

The Book of Chu Family in the Spring and Autumn Period of the Ten Kingdoms also records that in 908 (the second year of Liang Kaiping), Ma Yin invited Liang Dynasty to set up a "map-returning service" in the border, Jing, Xiang, Tang, Ying, Fuzhou and other places, with the aim of "transporting tea to the north and south of Henan, so as to facilitate them to pick up horses and chariots". It can be seen that "Wu Di" means "Guitu", which is not only a transit point for tea sales in the north, but also a direct selling point for tea. Tea and tapirs (textiles and the like) are mainly traded in the Central Plains, while tea and horses are mainly traded in northern minority areas. The trading method is barter and simultaneous trading, the latter is mainly, that is, after selling the tea, I bought the horses and chariots on the spot. Ma Chu made a lot of money in the tea-horse trade. "The profit of selling tea in the Central Plains has been millions of years." It can be seen that the development of tea industry and tea industry is an important feature of Machu Picchu economy.