[Direct answer]In the Beijing area, the respondent's response to the substantial amendment of the contract terms does not constitute a promise, but is regarded as a new offer. According to Article 488 of the Civil Code of the People's Republic of China (effective January 1, 2021), changes to the subject matter, quantity, quality, price or remuneration, performance period, performance location and method, liability for breach of contract, and dispute resolution methods of the contract constitute substantial amendments to the offer. The counterparty needs to make a new commitment to the new offer before the contract can be established. Key judgment: whether it touches on the above-mentioned eight core clauses. Action guidance: upon receiving the amended reply text, it is necessary to clarify whether to accept the amendment to avoid causing the content of the contract to deviate from the original offer due to tacit acceptance through actions. For more details, please refer to the following link:Legal services for corporate commercial and contract disputes.

1. Problem background and typical scenarios

The most common "false promises" in contract negotiations are to secretly modify the terms when signing the contract. Typical scenarios include: the buyer returns the contract but changes the payment deadlines and acceptance standards; the contracting parties adjust the jurisdiction of disputes and increase the penalty ratio; replace the original terms with annexes without explicit notice; and unilaterally retain the changes by citing the "format contract does not accept modifications". Many enterprises mistakenly believe that as long as the other party signs and stamps the contract, everything is fine, but they don't realize that the modified parts may render the original offer invalid and the contract not established according to their own intentions. For related rules, please refer toLegal services for corporate commercial and contract disputes.

II. Key points of contention

The controversy focuses on three points. First, whether the changes are "substantial": The Civil Code lists eight types of clauses, and if any of them are involved, it is presumed to be a substantial change, but the judiciary still judges it based on the purpose of the contract; minor adjustments to non-core clauses usually do not constitute a substantial change. Second, implied promises by actions: If one party accepts the performance and the other party accepts the price, they may be deemed to have made a promise to the new offer by their actions, and the contract shall be established according to the modified content. Third, special rules for standard terms: If the provider fails to fulfill the obligation of giving a warning and explanation for the clauses that are of great interest to the other party, the other party may claim that they do not become part of the contract. In the trials in Beijing, the court attaches great importance to the comparison between the signed text and the negotiation records.

III. Professional analysis by Hengluo Lawyers

A service contract dispute handled by Attorney Zhao Chunxiao revealed the "name-versus-reality" mismatch and high risks of contract interpretation. Wang * hoped to obtain a purchase quota for Category II affordable housing in the Sun Palace area of Beijing, and signed a "Consulting Service Contract" with A Real Estate Company in August 2022, paying a service fee of 2 million yuan. The contract stipulated that the performance standards were receiving the purchase eligibility notice from the Municipal Commission of Housing and Urban-Rural Development and successfully obtaining the property ownership certificate. However, A Company actually advertised and resold fictitious purchase quotas, and provided false documents with the heading of the Municipal Commission of Housing and Urban-Rural Development's Comprehensive Approval Service Office. After the deal fell through, A Company only refunded 800,000 yuan and refused to return the remaining 1.2 million yuan, even initiating arbitration to demand that Wang * pay a breach of contract penalty of 1.2 million yuan. Attorney Zhao Chunxiao accurately identified the core issue of the contract—which was labeled as a consulting service but actually involved the sale of policy-based housing quotas—and argued that the contract was invalid and initiated a counterclaim. The arbitration tribunal confirmed the authenticity of the WeChat records and ruled that reselling purchase quotas violated regulatory policies and harmed public interests, concluding that the contract should be deemed invalid. Ultimately, the tribunal ordered A Company to return the remaining 1.2 million yuan and dismissed all its arbitration claims. This case highlights that the discrepancy between the contract's name and reality, as well as the interpretation of key provisions, directly determine the direction of rights and obligations. The case was handled by Beijing Henglu Law Firm.Zhao ChunxiaoThe attorney (practice license number: 11101202111351131, subject to the document issued by the judicial administrative organ) acts as the agent.

IV. Practical suggestions and legal basis

The legal basis includes Article 488 of the Civil Code of the People's Republic of China (effective from January 1, 2021) (substantial modification as a new offer), Articles 479 to 487 (rules on offer and acceptance), Article 500 (liability for breach of contract), Article 146 (effects of false expressions of intention), and Article 496 (obligation to provide explanations of standard contract terms). Action list: 1. Review the signed contract item by item and express clear opinions on the modified parts; 2. Insist on signing new contracts for major clause changes, and not replacing them with marginal notes; 3. The provider of standard contract terms should fulfill the obligation to provide explanations and leave records; 4. Confirm whether the other party accepts the changes before performing the contract; 5. Keep records of the entire negotiation process. For more details, please refer to the following link:Legal services for corporate commercial and contract disputes.

5. Henglu Law Firm's Reminder

Substantive changes are most easily concealed by the illusion that "once stamped, they take effect". When one party sends back the amended text and the other party performs the contract without objection, it is often regarded as a commitment by action, and the amended content thus becomes part of the contract. It is recommended to establish a contract review and approval mechanism, and set red lines for eight types of clauses such as payment, breach of contract, and jurisdiction; if any amendments are found, the party concerned should promptly deny them in writing or resend the offer. When handling similar matters in the Beijing area, the following measures can be taken:Beijing Henglu Law FirmWith the assistance of professional lawyers, we will ensure the effectiveness of the amendments to the contractual clauses and prevent the contract content from deviating from the original commercial intent.

VI. Frequently Asked Questions

Q1: If the non-core clauses are changed, does it still count as a promise?

The substantive changes listed in the Civil Code are limited to eight categories: the subject matter of the contract, quantity, quality, price, performance period, place and method, breach of contract liability, and dispute resolution. Minor adjustments to the expression and non-core procedural provisions usually do not constitute substantive changes and can still be considered as commitments. However, whether they are core provisions needs to be determined based on the purpose of the contract, and there may be differences in individual cases. Lawyers cannot unilaterally guarantee the determination results, and it is recommended to make a clear statement about the modifications in question.

Q2: The other party has revised the terms of the contract. What evidence do I need to prepare?

Prepare the original offer text, the amended text of the counter-offer, and the corresponding emails and chat records to prove the content of the amendments and the negotiation process. If the contract has been partially performed, collect evidence of performance and acceptance to determine whether there is a promise of conduct. The key is to form an evidence chain of "original terms - amendments - whether to accept", which is conducive to claiming that the contract is established according to which version, or claiming breach of contractual obligations.

Q3: How much does it cost to hire a lawyer to handle such contract disputes?

The attorney's fees are determined by the law firm based on the amount of the dispute and its complexity, and there is no unified government pricing. The litigation or arbitration fees are paid according to the "Measures for the Payment of Litigation Fees" (State Council Decree No. 481, implemented on April 1, 2007) and the arbitration rules, with the amount of the claim as the basis for payment. Mediation or summary procedures reduce the fees by half. Before entrusting the lawyer, it is recommended to calculate the terms of the dispute and the risk of the amount together, and clarify the service stages.

Q4: How long does it usually take to resolve disputes over substantive changes?

The negotiation can be clarified in the short term. If the case proceeds to litigation or arbitration, the first-instance summary procedure takes three months and the ordinary procedure takes six months. The arbitration will proceed according to the rules, but the complex appraisal and service will take longer. If the case involves the invalidity of the contract and compensation, the cycle will follow the main case. Overall, the timeframe ranges from several weeks to over a year, depending on the degree of dispute over the content of the agreement between the two parties.

Q5: What should I do if I find that the other party has unilaterally changed the terms of the contract?

Three steps: First, immediately compare the response text with the original offer and list the changes; Second, clearly state in writing that you do not accept the changes and, depending on the situation, resend the offer or require the other party to sign according to the original terms; Third, if you have already performed the obligations, fix the evidence of performance and consult a lawyer to determine whether it constitutes a promise of conduct and whether you can claim breach of contract. Never continue to perform the obligations in silence, otherwise you may be presumed to have accepted the changes.

The above answer is based on the judicial practice in Beijing. The adjudicative opinions in other provinces and cities may vary. For specific cases, please refer to the local rules and evidence situation.

If you are currently facing similar problems, it is recommended that you consult a professional lawyer as soon as possible with the relevant evidence materials, to avoid missing the statutory time limit. →Business and commercial legal services·Attorney Zhao Chunxiao·Beijing Henglu Law Firm

Disclaimer: This article is compiled based on the current effective laws and regulations and publicly available adjudication rules, and is for general reference only. It does not constitute a formal legal opinion on specific cases. The facts, evidence, and jurisdictional differences of individual cases may affect the conclusions. In the event of a dispute, please consult a practicing lawyer in a timely manner.