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Underground banks to engage in illegal underground financial business known as a class organization. Underground banks are members of the basic relations between the blood around, the vast majority of underground banks have implemented family-management in a region between banks has formed a huge pyramid-shaped management network. The operating underground banks often accompanied by huge profits, while operating underground banks is in breach of relevant national laws and regulations, but many people are still lured by the huge profits from crime, so that underground banks continue despite repeated prohibitions. Guangdong underground banks main business is illegal and foreign currency exchange and securities companies in Hong Kong and Macao, casino closely linked to China's social and have an adverse impact on the economy. Underground banks and the formation of development has its own unique economic, and social aspects of reasons. With high profits and the market for undergroun