【正文】 hange to the terms of the offer.Article 31 Acceptance Containing Nonmaterial Changes An acceptance containing nonmaterial changes to the terms of the offer is nevertheless valid and the terms thereof prevail as the terms of the contract, unless the offeror timely objects to such changes or the offer indicated that acceptance may not contain any change to the terms thereof.Article 32 Time of Formation in Case of Memorandum of ContractWhere the parties enter into a contract by a memorandum of contract, the contract is formed when it is signed or sealed by the parties. Article 33 Time of Formation in Case of Letters or Electronic Messages。 if no specific system has been designated, the time when the electronic message first enters into any of the recipient39。(iv) quality。GENERAL PRINCIPLESChapter One General ProvisionsS REPUBLIC OF CHINACONTRACT LAW OF THE PEOPLE39。 Writing RequirementA contract may be made in a writing, in an oral conversation, as well as in any other form.A contract shall be in writing if a relevant law or administrative regulation so requires. A contract shall be in writing if the parties have so agreed.Article 11 Definition of WritingA writing means a memorandum of contract, letter or electronic message (including telegram, telex, facsimile, electronic data exchange and electronic mail), etc. which is capable of expressing its contents in a tangible form.Article 12 Terms of ContractThe terms of a contract shall be prescribed by the parties, and generally include the following:(i) names of the parties and the domiciles thereof。s manifestation of intention to enter into a contract with the other party, which shall ply with the following:(i) Its terms are specific and definite。(iv) The offeree makes a material change to the terms of the offer.Article 21 Definition of AcceptanceAn acceptance is the offeree39。 Duty to Call AttentionWhere a contract is concluded by way of standard terms, the party supplying the standard terms shall abide by the principle of fairness in prescribing the rights and obligations of the parties and shall, in a reasonable manner, call the other party39。 where a party improperly facilitated the satisfaction of a condition, the condition is deemed not to have been satisfied.Article 46 Contract TermThe parties may prescribe a term for a contract. A contract subject to a time of mencement bees effective at such time. A contract subject to a time of expiration is extinguished at such time.Article 47 Contract by Person with Limited Capacity A contract concluded by a person with limited capacity for civil act is valid upon ratification by the legal agent thereof, provided that a contract from which such person accrues benefits only or the conclusion of which is appropriate for his age, intelligence or mental health does not require ratification by his legal agent.The other party may demand that the legal agent ratify the contract within one month. If the legal agent fails to manifest his intention, he is deemed to have declined to ratify the contract. Prior to ratification of the contract, the other party in good faith is entitled to cancel the contract. Cancellation shall be effected by notification.Article 48 Contract by Unauthorized AgentAbsent ratification by the principal, a contract concluded on his behalf by a person who lacked agency authority, who acted beyond his agency authority or whose agency authority was extinguished is not binding upon the principal unless ratified by him, and the person performing such act is liable. The other party may demand that the principal ratify the contract within one month. Where the principal fails to manifest his intention, he is deemed to have declined to ratify the contract. Prior to ratification of the contract, the other party in good faith is entitled to cancel the contract. Cancellation shall be effected by notification.Article 49 Contract by Person with Apparent Agency AuthorityWhere the person lacking agency authority, acting beyond his agency authority, or whose agency authority was extinguished concluded a contract in the name of the principal, if it was reasonable for the other party to believe that the person performing the act had agency authority, such act of agency is valid. Article 50 Contract Executed by Legal RepresentativeWhere the legal representative or the personincharge of a legal person or an organization of any other nature entered into a contract acting beyond his scope of authority, unless the other party knew or should have known that he was acting beyond his scope of authority, such act of representation is valid.Article 51 Unauthorized Disposal of Property through ContractWhere a piece of property belonging to another person was disposed of by a person without the power to do so, such contract is nevertheless valid once the person with the power to its disposal has ratified the contract, or if the person lacking the power to dispose of it when the contract was concluded has subsequently acquired such power.Article 52 Invalidating CircumstancesA contract is invalid in any of the following circumstances:(i) One party induced conclusion of the contract through fraud or duress, thereby harming the interests of the state。s Court or an arbitration institution for amendment or cancellation of a contract if:(i) the contract was concluded due to a material mistake。 where restitution in kind is not possible or necessary, allowance shall be made in money based on the value of the property. The party at fault shall indemnify the other party for its loss sustained as a result. Where both parties were at fault, the parties shall bear their respective liabilities accordingly.Article 59 Remedies in Case of Collusion in Bad FaithWhere the parties colluded in bad faith, thereby harming the interests of the state, the collective or a third person, any property acquired as a result shall be turned over to the state or be return