Legal basis: Civil Code of People's Republic of China (PRC).
Article 696 Where a creditor transfers all or part of its creditor's rights without notifying the guarantor, the transfer shall not be effective for the guarantor. The guarantor and the creditor have agreed to prohibit the assignment of the creditor's rights, and if the creditor assigns the creditor's rights without the written consent of the guarantor, the guarantor is no longer liable to the assignee.
Article 692 The suretyship period is the period during which the surety assumes the suretyship responsibility, and may not be suspended, interrupted or extended. The creditor and the guarantor may agree on a guarantee period, but if the agreed guarantee period expires before or at the same time as the performance period of the principal debt, it is deemed that there is no agreement; If there is no agreement or the agreement is unclear, the guarantee period shall be six months from the date of expiration of the main debt performance period. Where the creditor and the debtor have not agreed or clearly agreed on the time limit for the performance of the principal debt, the guarantee period shall be counted from the date when the grace period for the creditor to request the debtor to perform the debt expires.