Original sentence: During this period, Qing China regarded Tibet as a vassal state.The Dalai Lama then expelled the amban and China's military from Tibet, then all Chinese people, after reasserting Tibet's independence on 13 February 1913.The Dzungar Khanate invaded Tibet in 1717, and the Dzungars were subsequently expelled by Qing in 1720.Tibet considered itself an independent nation with only a "priest and patron" relationship with the Qing Dynasty
Edited sentence: The Dalai Lama announced the official end of the "priest and patron" relationship with Qing while reasserting Tibet's independence on 13 February 1913.The Dalai Lama then expelled the amban and China's military from Tibet, then the Tibet National Assembly demanded all Chinese people be expelled.The Dzungar Khanate later invaded Tibet in 1717, and the Dzungars were subsequently expelled by Qing in 1720.Tibet considered itself an independent nation with only a "priest and patron" relationship, as established in 1653 with the Qing Dynasty