For the creation of security interest, a contract on the provision of security shall be entered into in accordance with the provisions of this Code and other laws. Contracts on the provision of security include mortgage contracts, pledge contracts and other contracts with security functions. 设立担保物权，应当依照本法和其他法律的规定订立担保合同。担保合同包括抵押合同、质押合同和其他具有担保功能的合同。 A contract on the provision of security is a collateral contract of the master contract on obligations. When the master contract on obligations ceases to be effective, the contract on the provision of security shall cease to be effective accordingly, except as otherwise provided for by any law. 担保合同是主债权债务合同的从合同。主债权债务合同无效的，担保合同无效，但是法律另有规定的除外。