Bank running bill is commonly known as bank card deposit and withdrawal transaction statement, also known as bank account transaction statement. Refers to the list of deposit and withdrawal transactions between customers and banks within a period of time. In the case of asymmetric information between bank flow and work certificate, bank flow can reflect the monthly income of borrowers for a period of time, so it will be more convincing to financial institutions and small loan companies. In other words, even if the income on the work certificate is higher, it will not help. If the bank has no running water, you can't get a loan. Stability and continuity are crucial factors.