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Li Dazhao or Li Ta-chao was a Chinese intellectual and revolutionary who participated in the New Culture Movement in the early years of the Republic of China, established in 1912. He co-founded the Chinese Communist Party (CCP) with Chen Duxiu in July 1921. He helped build a united front between the CCP and Sun Yat-sen's Nationalist Party (KMT) in early 1924. During the Northern Expedition, Li was arrested and then executed by warlord Zhang Zuolin in Beijing in April 1927.