Original sentence: The bulk of western and central Tibet (Ü-Tsang) was often at least nominally unified under a series of Tibetan governments in Lhasa, Shigatse, or nearby locations
Edited sentence: The bulk of western and central Tibet (Ü-Tsang) was often at least nominally unified under a series of Tibetan governments in Lhasa, Shigatse, or nearby locations; these governments were at various times under Mongol and Chinese overlordship.Thus Tibet remained a suzerainty of the Mongol and later Chinese rulers in Nanjing and Beijing, with reasonable autonomy given to the Tibetan leaders