In contrast to the Kuomintang, the Chinese Communist Party had been very friendly towards Koreans in China. Koreans had a long history of friendship with the Chinese communists. Koreans participated in both the Nanchang Uprising and Guangzhou Uprising, and contributed to the establishment of the Chinese Communist Party's army and the base of the Chinese Red Army in the Jinggang Mountains. :120 The Chinese Communist Party considered Koreans in China as the same class of people in China who were oppressed and exploited by both the Imperial Japanese and feudal warlords in China, and a reliable source of support in the fight against the Imperial Japanese and feudal warlords. In July 1928, the Chinese Communist Party officially included Koreans in China as one of the ethnic minorities of China on its 6th National Conference. After the Japanese invasion of Northeast China, cooperation between the communists and Koreans in China strengthened and the social status of Koreans among the communists rose to new heights. :719-721 After the end of Second Sino-Japanese War, the Chinese Communists let the Koreans choose whether to voluntarily become Chinese citizens and left them ample time and options to choose. :726 In March 1946, Northeast China started a land reform, allocating the land formerly occupied by the Japanese or rich Chinese. Korean farms in China received farmland just as other Chinese farmers did. :671:133-135 From October 1947, the land reform was expanded to nationwide.:669