Where are Tibetans distributed?

Tibetans are distributed in Xizang Autonomous Region, Qinghai, Gansu, Sichuan and Yunnan provinces, with a population of about 4.59 million (1990). Tibetans are the appellation of Han nationality, and Tibetans call themselves "bod". Tibetans have different names for Tibetans living in different areas: people living in Ali area of Tibet call themselves "Duiba"; People in post-Tibetan areas call themselves "Zangba"; The original Tibetan people called themselves "Wei Ba"; People living in eastern Tibet and western Sichuan call themselves "Kangba"; People living in northern Tibet, northwestern Sichuan, southern Gansu and Qinghai call themselves "Andova". Collectively referred to as "Boba".