Legal analysis: the preservation period of import and export ledgers and related certification materials shall not be less than six months. Check the business license or identity certificate of the seller who provides the service, the certificate of origin or source of edible agricultural products and the certificate of conformity, establish an entry-exit ledger, and record the name, origin, storage date, shipment date, seller's name and contact information of edible agricultural products.

Legal basis: Article 196 of the Criminal Law of People's Republic of China (PRC) commits credit card fraud under any of the following circumstances. If the amount is relatively large, it shall be sentenced to fixed-term imprisonment of not more than five years or criminal detention and fined not less than 20,000 yuan but not more than 200,000 yuan; If the amount is huge or there are other serious circumstances, he shall be sentenced to fixed-term imprisonment of not less than five years but not more than ten years, and shall also be fined not less than 50,000 yuan but not more than 500,000 yuan; If the amount is especially huge or there are other especially serious circumstances, he shall be sentenced to fixed-term imprisonment of not less than 10 years or life imprisonment, and shall also be fined not less than 50,000 yuan but not more than 500,000 yuan or confiscated property:

(a) using a forged credit card, or using a credit card fraudulently obtained with a false identity certificate;

(2) Using an invalid credit card;

(3) Fraudulent use of another person's credit card;

(4) malicious overdraft.

The term "malicious overdraft" as mentioned in the preceding paragraph refers to the behavior that the cardholder overdraws beyond the prescribed limit or time limit for the purpose of illegal possession, and refuses to return it after being urged by the issuing bank.