Why are there no people in green among the 56 ethnic minorities?

Besides Chuanqing people, there are many unidentified ethnic groups in China. In People's Republic of China (PRC)'s population statistics, the unrecognized ethnic groups in China refer to all ethnic groups that have not been officially recognized because of their small numbers or assimilation by the Han nationality or other ethnic groups, and may also be ethnic minorities whose ethnic problems are unclear and unrecognized by the China government. At present, there are about 730,000 unidentified ethnic groups in China. China citizens classified as undetermined ethnic groups will fill in the name of the person (undetermined ethnic group) in the ethnic column of their identity cards. For example, the nationality column in the resident ID card is: Deng people. Unidentified ethnic group:/%E4% B8% AD% E5% 9B% BD% E6% 9C% AA% E8% AF% 86% E5% 88% AB% E6% B0% 91%E6% 97% 8F.