Attributing to the long duration, the relational nature and the open terms, long-term contracts differ from standard contracts. There are many issues particularly relevant in the context of long-term contracts that the general contract law does not address. Accordingly, the 2016 edition of the UNIDROIT Principles of International Commercial Contracts defines the notion of“long-term contracts”and contains a number of special provisions, such as negotiation, open terms, evolving terms, co-operation, supervening events, restitution and post-contractual obligations, which takes into account the special need of long-term contracts. It is suggested that the principles should be a model for Chinese legislature to amend Contract Law and provide adequate solutions for long-term contracts.