Where did Bai originate? When can I buy it? Why is it called white

Bai originated in Shaanxi and Henan. During the Warring States Period, Henan Bai surname (Bai) moved to Shaanxi and other places. According to reports, Bai's son first moved to Qin and developed and multiplied in Shaanxi today. During the Qin Dynasty, the first emperor ruled the whole country. Zhong Bai, the son of Leitian, was appointed in Taiyuan, Shanxi, and his descendants lived in Taiyuan. During the Wei, Jin, Southern and Northern Dynasties, it was formed through Zhong Bai and Taiyuan County, and then moved to Hancheng and Weinan in Shaanxi. Or move to Xiangyang, Hubei; Or moved to Luoyang, Henan Province, all developed vigorously in the local area.