statement: Sharing prosperity is a goal of human society, but unreasonable income distributions develop that lead to social unrest and regime change. However, around the world, a small number of people have begun to own most of society’s wealth. China, the world's largest socialist country, is supposed to fight for the rights of the proletariat, but has also been suffering from an increasingly serious wealth inequality. We studied the available income data for Chinese provinces (from 2003 to 2019) and in contrast with previous research, found that the wealth gap depended on how the inequality index was calculated and on differences in regional characteristics. Our results provide insights that will benefit other countries plagued by wealth inequality.