Answer
A month after Mao's death, Hua Guofeng removed the Gang of Four from power. The Gang of Four had been Mao's closest associates, and they had played a major role in his administration. However, after Mao's death, Hua Guofeng began to consolidate his own power, and he saw the Gang of Four as a threat to his rule. He therefore removed them from power and had them arrested.