Some articles on polhanas:

History Of Tibet - Manchurian Qing Dynasty - Post-Kangxi
... This persecution created a rift between Polhanas, who had been a Nyingma monk, and Kanchenas ... Kanchenas and took control of Lhasa in 1727, and Polhanas fled to his native Ngari ... Polhanas gathered an army and retook Lhasa in July 1728 against opposition from the Lhasa nobility and their allies ...