 Soviet advisers—the most prominent of whom was Mikhail Borodin, an agent of the Comintern—arrived in China in 1923 to aid in the reorganization and consolidation of the KMT along the lines of the Communist Party of the Soviet Union, establishing a Leninist party structure that lasted into the 1990s.The Communist Party of China (CPC) was under Comintern instructions to cooperate with the KMT, and its members were encouraged to join while maintaining their separate party identities, forming the First United Front between the two parties.Mao Zedong and early members of the CPC also joined the KMT in 1923.