One of the most important, but under-researched and least well understood, instruments of the Chinese Communist Party (CCP) is the extensive national network of Party schools (approximately 2,700). They serve as the key institution of mid-career training and indoctrination for all Party cadres, many government cadres, some military officers and selected businessmen. In addition to its training and indoctrination functions, the Party school system (particularly the Central Party School in Beijing) is also an important generator of policy initiatives. Not all Party schools are stalwart institutions, with some being involved in corruption scandals, but on the whole they have come to play an increasingly important role in the CCP's rebuilding efforts in recent years.