Bank flow can be checked for years.

Five years. According to the Administrative Measures on Customer Identification, Customer Identity Information and Transaction Records of Financial Institutions, which was implemented in 2007, bank transaction records are kept for at least five years from the time of transaction, that is, the running records of banks can be checked for five years. As for the records of running water for more than five years, it depends on the running water retained by specific banks for more than five years. For example, China Industrial and Commercial Bank can check the running water for nearly 10 years, while Industrial Bank can only check the running water for nearly five years.