Zheng-tong: Year 2, Month 9, Day 22
21 Oct 1437
The persons sent by the Che-li Military and Civilian Pacification Superintendency in Yun-nan, and... offered tribute of elephants, horses, gold and silver utensils and other goods. A banquet as well as thin silks, cotton cloth, variegated satins, clothing and paper money, as appropriate, were conferred upon them.
Zhong-yang Yan-jiu yuan Ming Shi-lu, volume 23, page 667