The characteristics of the crystal family.

Sorry, I know very little about the crystal family. According to the information I have, Achang people are mainly distributed in Longchuan, Yingjiang and Lianghe counties in Dehong Autonomous Prefecture, Tengchong county in Baoshan area and Yunlong county in Dali Bai Autonomous Prefecture. The population is about 37,500, of which Longchuan County has the largest Achang nationality, accounting for about 95% of the total population of Achang nationality in China. In addition, Achang people are also distributed in Lanping Bai Pumi Autonomous County of Nujiang Lisu Autonomous Prefecture and Dashi of Yulong Naxi Autonomous County of Lijiang City, with hundreds of families. Achang nationality has a long history, and its ancestors lived in Jinsha River, Lancang River and Nujiang River basins in northwest Yunnan very early. About13rd century, after many migrations, they gradually settled in the place where they now live. Achang people learned the techniques of cultivating paddy fields and making ironware from the Han army stationed in the frontier, which promoted the division of labor between agriculture and handicrafts, and the commodity economy also developed initially. During the Tang and Song Dynasties, Achang areas were under the jurisdiction of Nanzhao and Dali regimes. Tusi system has been implemented in Ming and Qing dynasties. Before liberation, Achang area was in feudal lords economy, and the landlord economy had developed to some extent. At that time, the lords were mostly Dai chiefs and the landlords were mostly Han Chinese.

The above information is for reference only. I suggest you consult more professional materials to learn more about the crystal family.