Yong-le: Year 18, Month 4, Day 22
3 Jun 1420
Nai Ai-na and others, a total of 80 persons who had been sent by San-lai Bo-mo-la-zha-di-lai, the king of the country of Siam, offered tribute of local products. Paper money and silks were conferred upon them. The eunuch Yang Min was sent to escort them back to their country and to confer upon the king brocaded fine silks, silk gauzes and other goods.
Zhong-yang Yan-jiu yuan Ming Shi-lu, volume 14, page 2207