Legal analysis: A bad check refers to a check that the drawer's actual deposit at the payer is not enough to pay the bill amount when the cheque holder demands payment. According to the law of negotiable instruments, the amount of checks issued by the drawer shall not exceed the actual deposit amount at the payer's place, that is, it is not allowed to issue a blank check to defraud property, and criminal responsibility shall be investigated according to law.

Legal basis: People's Republic of China (PRC) Bill Law.

Article 87 The amount of a cheque issued by the drawer of a cheque shall not exceed the actual deposit at the drawee at the time of payment. If the cheque issued by the drawer exceeds the actual deposit amount of the payer at the time of payment, it is a bad cheque. It is forbidden to issue bad checks.

Article 102 Whoever commits one of the following acts of bill fraud shall be investigated for criminal responsibility according to law: (1) Forging or altering bills; (2) Intentionally using forged or altered bills; (3) Issuing a bad check or deliberately issuing a check that is inconsistent with its reserved signature pattern or seal to defraud property; (four) issuing bills of exchange and promissory notes without reliable sources of funds to defraud funds; (5) The drawer of a bill of exchange or promissory note makes false records at the time of issuing the bill to defraud money or property. (six) fraudulent use of other people's bills, or deliberately use expired and invalid bills to defraud property; (7) The payer, the drawer and the holder collude maliciously and commit any of the acts listed in the preceding six items.