【裁判要旨】买卖双方依所签订的合同,应当遵循诚实信用原则全面履行自己的义务,一方履行不符合合同约定的,属瑕疵履行。若该瑕疵在两年多均未能消除,给对方造成一定的经济损失,导致最终不能实现合同目的的,构成根本性违约,依合同法第一百一十条法定解除合同情形规定,一方当事人在法定解除合同的条件成就时,可以直接行使解除权。 【Referee Essentials】 In accordance with the signed contract, the buyer and seller shall perform their obligations in good faith in accordance with the principle of good faith. If one party fails to fulfill the contractual stipulations, it shall be a defect fulfillment. If the flaw failed to be eliminated in more than two years, causing some economic loss to the other party, resulting in the ultimate inability to achieve the purpose of the contract, which constitutes a fundamental breach of contract. According to the Statutory Statute of the Contract Law Article 110, one of the parties When statutory conditions for the termination of the contract are fulfilled, the right of cancellation can be directly exercised.