After the Ming conquest of Yunnan in February 1382 the Mong Mao under Si Lunfa decided to submit to Ming authority, and was granted the tusi title of Pacification Commissioner of Pingmian Pacification Commission. In August 1384 Si Lunfa sent a tribute mission to the Ming court surrendering the Yuan seal of commission. As a result he was promoted to Luchuan-Pingmian Pacification Commission with authority over military and civilian affairs. However Si Lunfa was not content with his position and in January 1386 he led a force of over 100,000 in an attack on Jingdong prefecture.