As ruler Changchub Gyaltsen was keen to revive the glories of the Tibetan Empire of Songtsen Gampo and assert Tibetan independence from the Mongol Yuan Dynasty and from Ming Dynasty China.
As ruler Changchub Gyaltsen was keen to revive the glories of the Tibetan Empire of Songtsen Gampo and assert Tibetan independence from the Mongol Yuan Dynasty and from Ming Dynasty China.
In the 23rd year of Zhenguan (貞觀二十三年，AD 649), King of Xihai Jun (西海郡王) was conferred upon Songtsen Gampo (松贊幹布), the King of Tubo (吐蕃, or Tibet), by Tang Gaozong (唐高宗), the emperor of Tang Dynasty.