u/Additional_Stick_311

Source of the information: https://dn711405.ca.archive.org/0/items/wen-dan-and-its-neighbors-the-central-mekong-valley-in-the-seventh-and-eighth-centuries/Wen%20Dan%20and%20its%20neighbors%20the%20central%20Mekong%20Valley%20in%20the%20seventh%20and%20eighth%20centuries.pdf

More information about Qian/Gan Zhi Fu: https://en.wikipedia.org/wiki/Syamapura_Kingdom