It is a series of numbers or letters used by banks to identify customers. The reservation identification code of rural credit cooperatives is automatically generated by the system and sent to customers, who can get the identification code in short messages or telephone calls sent by banks. RuralCreditCooperatives (rural credit cooperatives in English) refers to a rural cooperative financial institution established with the approval of the People's Bank of China, which is composed of members' shares, implements democratic management and mainly provides financial services for its members.