Zheng-tong: Year 13, Month 6, Day 13
13 Jul 1448
....the interpreter Yang Lu, who had been sent by Meng Yong, the native-official prefect of Shun-ning Prefecture in Yun-nan...came to Court and offered tribute of horses, camels and local products. A banquet as well as paper money, biao-li of variegated silks and other goods, as appropriate, were conferred upon them.
Zhong-yang Yan-jiu yuan Ming Shi-lu, volume 29, page 3231