Jing-tai: Year 4, Month 5, Day 4
10 Jun 1453
The attendant minister Li Shang and others who had been sent by Li Jun, the king of the country of Annam, offered felicitations on the occasion of the official designating of the Heir Apparent, and offered tribute of gold and silver utensils and local products. A banquet as well as paper money, silks and other goods, as appropriate, were conferred upon them.
Zhong-yang Yan-jiu yuan Ming Shi-lu, volume 33, page 5001