On this day, 71 years ago, on July 1, 1954 (June 2, 1954, the lunar calendar), China's first large-scale alumina production base was completed. On July 1, 1954, the first phase of the Shandong Aluminum Factory, the first large-scale alumina production base in China, was completed and a groundbreaking ceremony was held. The General Office of the CPC Central Committee sent a congratulatory letter on behalf of the Party Central Committee and Chairman Mao Zedong, and Premier Zhou Enlai sent a congratulatory letter and expressed gratitude to the Soviet experts who helped build the factory. Since then, New China has its own alumina industry