Clearly stipulate the way of joint and several liability guarantee. If there is no agreement or unclear agreement between the guarantor and the guarantor on joint and several liability guarantee and general guarantee, it is presumed to be joint and several liability guarantee; All contractual debts shall be fully paid off;

When the principal debtor fails to perform the debt at the expiration of the debt performance period, the guarantor shall bear the guarantee liability. In the case of joint and several liability guarantee, once the principal debtor fails to perform the principal contract debt at maturity, the creditor may require the principal debtor to pay off the debt or require the guarantor to assume the guarantee liability.

Article 388 of the Civil Code of People's Republic of China (PRC): To establish a security interest, a security contract shall be concluded in accordance with the provisions of this Law and other laws. Guarantee contracts include mortgage contracts, pledge contracts and other contracts with guarantee functions. The guarantee contract is a subsidiary contract of the main creditor's rights and debts contract. If the principal creditor's rights and debts contract is invalid, the guarantee contract is invalid, unless otherwise stipulated by law.

After the guarantee contract is confirmed to be invalid, if the third party is at fault, it shall bear corresponding civil liability according to its fault.