Hong-wu: Year 19, Month 1, Day 5
4 Feb 1386
The Yun-nan Administration Commissioner of the Left Zhang Dan memorialized: "Under the old precedents, merchants brought rice to Jin-chi and for every dou, they were given one yin of salt. This was allowed to ensure grain supplies. Thus the merchants collected there and the supplies were more than sufficient. Later, officials did not allow the transport of grain and the merchants rarely went there. Thus, the troops now have no means of ration supply. It is requested that the old system be followed." This was approved.
Zhong-yang Yan-jiu yuan Ming Shi-lu, volume 6, page 2677