Is it illegal for Jiaozuo department store to default on suppliers' payment?

It is not illegal for Jiaozuo department store to default on the payment of suppliers.

1. Propose a repayment plan and negotiate with the other party to gain their understanding.

2. You won't go to jail if you owe money to suppliers. Due payment is a contractual relationship, which bears civil liability for breach of contract, does not involve criminal offences and will not be subject to criminal punishment. According to Article 577 of the Civil Code, if a party fails to perform its contractual obligations or fails to perform its contractual obligations, it shall be liable for breach of contract such as continuing to perform, taking remedial measures or compensating for losses.