 He was a key follower of Shong Lue Yang, also known as the "Mother of Writing", who developed the script called Pahawh Hmong.After 1975, he was the main early leader of the Hmong ChaoFa movement in Laos, until dying in his base area on Phou Bia Mountain in around 2000.In the late 1970s he worked closely with Pa Kao Her, who later became the President of the Ethnic Liberation Organization of Laos (ELOL), which eventually became the ChaoFa Democratic Party.