【裁判要旨】在合同履行过程中,货物价格会因市场原因上涨或下跌,这是正常的履约风险。合同当事人在签订合同时应当充分考虑到这些因素,一旦合同签订后,就应当严格按照合同约定的内容履行,不能将履约风险转嫁给他人。当合同履行发生损失时,非违约方有减轻损害的责任,但这种责任应当考虑非违约方的合理选择。 [Referee summary] During the performance of the contract, the price of the goods may rise or fall due to the market, which is normal performance risk. When signing the contract, the parties to the contract shall take these factors into full consideration. Once the contract is signed, the contract party shall perform it in strict accordance with the contractual stipulations and shall not pass on the compliance risk to others. Non-defaulting parties have the responsibility of mitigating damage when there is a loss of contract performance, but such liability should take into account the reasonable choices of non-defaulting parties.