After the Long March,in Yan’an,the CPC adjusted its nationality policies,and proposed that ethnic minorities should manage their own internal affairs in their own places,which was finalized as regional autonomy for ethnic minorities.By comparing the two ideas put forward by Gu Jiegang,Fu Sinian,Fei Xiaotong and Wu Wenzao to solve nationality issues in China,the paper argues that in the two literatures on nationality issues of the Huis and the Mongols,the CPC did not adopt the solution of denying nationality identity of ethnic minorities in the multi-national Chinese state,and also did not ignore the challenges of the nationality identity to the multi-national state in the era of nationalism.Theoretically,the CPC established two important principles for the equality of nationalities in the multi-national state:first,respect and guarantee the rights of ethnic minorities to manage their own internal affairs in the the areas where they inhabit;second,ethnic minorities must unswervingly adhere to the national identity.The author concludes that the CPC has established a theory about the equality of nationalities that is in line with scientific principle and reality of multi-national China.This theory still has strong vitality by now.