The full name of Bank of China is Bank of China Limited (BOC). The Head Office is located at No. 1, Fuxingmennei Street, Beijing. It is one of the five major state-owned commercial banks. Bank of China's business scope covers commercial banking, investment banking, insurance and aviation leasing. It owns holding financial institutions such as BOC Hong Kong, BOC International, and BOC Insurance, and provides financial services to individual and corporate customers around the world. As the most international and diversified bank in China, Bank of China provides customers with comprehensive financial services in mainland China, Hong Kong, Macau, Taiwan and 37 countries. Mainly engaged in commercial banking business, including corporate financial business, personal financial business and financial market business and other businesses. In July 2013, the British magazine "The Banker" announced the 2013 ranking of the "Top 1,000 Global Banks", ranking 9th, consistent with the 2012 ranking. In addition, the World Brand Laboratory released the ranking results of "China's 500 Most Valuable Brands" in 2012. Bank of China ranked 10th with a brand value of 88.516 billion yuan, up one place from the 2011 ranking, and ranked second in the banking industry.

Industrial and Commercial Bank of China (full name: Industrial and Commercial Bank of China), referred to as ICBC, was established on January 1, 1984.

Founded in 1984, it is the first of the five major banks in China and one of the world's top 500 companies. It has the largest customer base in China and is the largest commercial bank in China. Industrial and Commercial Bank of China is China's largest wholly state-owned commercial bank. Its basic mission is to raise social funds through domestic and foreign financing activities in accordance with national laws and regulations, strengthen credit fund management, support enterprise production and technological transformation, and serve my country's economic construction.

China Construction Bank (referred to as Construction Bank or CCB, originally named People's Construction Bank of China, and renamed China Construction Bank on March 26, 1996) was established on October 1, 1954 (Jiawu Year) , is a joint-stock commercial bank and one of the five largest state-owned commercial banks. China Construction Bank's main business areas include corporate banking, personal banking and treasury services. It has 14,121 branches in mainland China (2012), branches in Hong Kong, Taiwan, Melbourne and other places. It owns CCB Fund, CCB Leasing, CCB Trust, CCB Life, Sino-German Housing Savings Bank, CCB Asia, CCB London, CCB Russia, CCB Dubai, CCB International and other subsidiaries provide customers with comprehensive financial services. China Construction Bank has a broad customer base and maintains banking business relationships with a number of large enterprise groups and leading enterprises in China's strategic economic industries. Its marketing network covers major regions across the country. At the end of June 2013, its market capitalization was US$176.7 billion, ranking first Ranked fifth among listed banks in the world. On May 8, 2014, the 2014 Forbes Global 2000 list was released, and China Construction Bank continued to be the second largest company in the world

The Postal Savings Bank of China was officially established on March 20, 2007. It is in the reform of postal services. A commercial bank established on the basis of a savings management system. Postal Savings Bank of China will inherit the postal financial business operated by the former State Post Bureau and China Post Group Corporation and the resulting assets and liabilities, and will continue to engage in business approved and approved by the original business scope and business license documents. On February 27, 2012, the Postal Savings Bank of China issued an announcement stating that with the approval of the State Council, the Postal Savings Bank of China Co., Ltd. was legally renamed as the Postal Savings Bank of China Co., Ltd. on January 21, 2012. Inherit all the assets, liabilities, institutions, businesses and personnel of the original Postal Savings Bank of China Co., Ltd. in accordance with the law, assume and perform the rights and obligations of the original Postal Savings Bank of China Co., Ltd. in relevant legally binding contracts or agreements, and corresponding creditor-debt relationships and legal responsibilities. The existing business offices, trademarks, Internet domain names and consultation service telephone numbers of Postal Savings Bank of China Co., Ltd. will remain unchanged and will continue to be used by the joint-stock company, and all businesses will continue as usual. Customers do not need to go through any change procedures