Middle-aged class is the abbreviation of training class for young and middle-aged cadres, and it is also a learning training class for China * * * Production Party to train reserve cadres. The middle-aged classes at the central level mainly train provincial and municipal leading cadres, mainly in the Central Party School and the Party's three major cadre training colleges: China Pudong, Jinggangshan and Yan 'an Cadre College. The training course for young and middle-aged cadres is an important base for cadres' education and training. It plays an important role in inheriting and carrying forward the party's fine traditions and style, improving the ability of leading cadres to lead socialist modernization and strengthening the party's ruling ability and advanced construction.