 By doing so, it has had an effect the size of the official Pu'er () tea production area.Simao District is ethnically diverse, with Han, Yi, Dai, Hani, Bulang, Wa, Lahu, and other ethnic groups.Han Chinese live mostly in Simaoba 思茅坝, Yixiangba 倚象坝, and Laojuntian 老君田 ("Simao Prefecture Almanac" 1993