legal ground
Article 387 of the General Principles of the Civil Law Where a creditor needs security in order to guarantee the realization of his creditor's rights in civil activities such as borrowing, buying and selling, he may establish a security interest in accordance with the provisions of this Law and other laws. If a third party provides a guarantee for the debtor to the creditor, it may require the debtor to provide a counter-guarantee. The provisions of this law and other laws shall apply to counter-guarantee.