Zheng-tong: Year 2, Month 5, Day 24
27 Jun 1437
The attendant minister Cai Shi-ming and others who had been sent by the country of Annam came to Court and offered tribute of gold and silver utensils. The envoy Bu-sha-pa Ma-shu who had been sent by the country of Champa, presented a gold-leaf memorial and offered tribute of local products... A banquet as well as biao-li of variegated silks and other goods, as appropriate, were conferred upon them.
Zhong-yang Yan-jiu yuan Ming Shi-lu, volume 23, page 605