| As prescriptions for contract cancellation right are too general, the present contract law may not sufficiently protect the safety of the trade and the legal interests of the party. Taking other countries legislation as reference, concerning with the realities of our own country's market economy and its convenience for judicial practice, this essay is to discuss on the main body, the quomodo, the time limitation of t contract cancellation right, as well as its restriction and elimination, including the legal aftereffects resulted from the contract cancellation, so that the conditions in dealing with contract cancellation right and its legal aftereffects are clear, and contract cancellation right systems will be perfected and improved in legislation.Contract cancellation right is entitled to either of the parties to petition the People's Court or an arbitration institution for canceling the concluded contract, because a party's intention is not expressed genuinely, which makes the contract invalid from the time of its formation. The author think, if the contract was concluded due to a material mistake or was grossly unconscionable, contract cancellation right should be entitled to the aggrieved party or to the party whose expression is defective, but not to both sides. That is to say, if the contract was concluded due to great misunderstanding, the party who mistook materially should be entitled to contract cancellation right; if the contract was grossly unconscionable at the time of its conclusion, the aggrieved party or the non-interest side should be entitled to contract cancellation right. When exercising the contract cancellation right, the party have a right to petition to the People's Court or an arbitration institution to cancel the contract. But this doesn't exclude the party to exercise the right directly to the relative party and produce the effect of canceling right. A party's cancellation right will extinguish if it fails to exercise the cancellation right within the legal limit time. Commencing on the time limit which Interpretations the Supreme People's Court of Certain Issues Concerning the Application of the General Principle of the Civil law has provided is different from the contract law, then, Contract law shall prevail. As to the contract that was concluded due to the other party's duress, the time limit to exercise the contract cancellation right should commence on the date when the duress ended. It is thought that the party's cancellation right is extinguished or is abandoned if the party knew the following circumstances: 1.demand the other party to perform the contract or accept the other side's pay after advocating material mistakes.2. claim damages to the party who failed to perform his obligations under the contract.3. advocate toperform the contract according to his understanding or amendment of the contract term and the other party has approved. The 1 and 2 situation is inferred from the party's expression. The third situation actually is that the both parties eliminate material mistake and conclude a new agreement.Contract cancellation right should be given certain restrictions. If the contract was concluded due to a material mistake, the party who mistook materially for his gross negligence shall not be entitled the contract cancellation right ; If the contract was grossly unconscionable at the time of its conclusion .which is due to the other party taking advantage of the party's hardship, the non-interest party can be entitled to the contract cancellation right. The party that was cheated or coerced by a third party can enjoy the contract cancellation right if the other party knew or should know the cheating or duress. The main body of the contract cancellation right will lose this right once it exercises the amendment contract right. The amendment contract right may apply to the circumstance that both parties mistook or the contract is grossly unconscionable. The aggrieved party doesn't have such right if the contract was concluded by cheating or coercion. In principle, contract cancellation does not exist in contracts based on common behavior such as contract of partnership, joint-venture's contract etc. The party can also enjoy the contract cancellation right if there are null reasons in the contract. Contract cancellation right and the right of claiming warranted the absence of any defect can compete or shun, but only one can be chose. Contract cancellation right and claim damages right can coexist and they do not repel with each other.The aftereffects of exercising contract cancellation right. (1) restitution of the property. The nature of returning the property can either be the right of claim of returning the original items or the right of claim of profits acquired improperly, both of which can compete or shun. Restitution of the price only apply to claim of profits acquired improperly. Because there are defects in the measures of restitution of the property, it should be provided to take restoration of original condition as one of the measures after exercising contract cancellation right.(2) compensation for losses. We should do different understanding according to concrete situation. In general situation, both sides all have fault, to the parties of both sides should bear corresponding responsibility to losses caused to the each other. When both sides know that violate the law or the public interest, then, the sentence"... both sides all have fault, so they shall each bear their proper share of the responsibility" should be constructed as the erring both sides bear their own damages. |