Such as: Joint suretyship should follow the principle of contractual specifications so as to ensure guarantor 'subrogation and a claim to exemption from liability, offering relief to guarantor to a maximum degree; 连带责任保证应当遵循契约约定原则,赋予保证人代位权和免责请求权,以充分保护保证人的利益,最大限度地给予保证人救济;