If your employer unilaterally demotes you or slashes your salary, object in writing immediately: working silently under the new terms for over a month waives your right to invalidate the change

Modifying job roles or compensation constitutes an amendment to the employment contract, requiring mutual agreement in writing. However, if you remain silent and work under the modified role or reduced salary for over one month, courts legally treat your conduct as tacit acceptance and will reject subsequent claims that the modification was invalid. Object in writing immediately upon notice.

Zero financial cost. Immediately upon receiving demotion or salary cut notices, dispatch a formal written objection via company email or WeChat, preserving screenshots. The difficulty is withstanding face-to-face workplace friction while remaining on the job. If the employer terminates you or unlawfully docks wages, initiate labor arbitration (free of charge, 45-day statutory timeline).

Under the Labor Contract Law, employment contracts can only be modified if employer and employee reach consensus through negotiation, and amendments must be executed in written form. However, Supreme People's Court judicial interpretations establish a critical exception: where parties orally agree to modify a labor contract and the employee actually performs under the modified terms for more than one month, the modification is legally binding. Courts will not support an employee's subsequent claim that the change was invalid due to lack of written form, provided the modified terms do not violate mandatory laws or public order. Judicial standards issued by Beijing High Court clarify employer management discretion: where contracts do not specify a precise job role, employers may reasonably adjust positions based on legitimate operational needs, evaluated against four criteria: operational necessity, legitimate corporate purpose, employee competency match, and preservation of salary/benefits. Where contracts explicitly define the position without unilateral reassignment clauses, unilateral demotion constitutes contractual breach, requiring back-pay of wage differentials benchmarked against the original role. Broad work location stipulations such as "Nationwide" or "Beijing Municipality" are deemed ambiguous, benchmarking statutory location to where the employee actually reported to work; employers cannot alter work locations without justifiable cause. If an employer fails to pay agreed wages in full and on time, employees can terminate the contract and claim statutory severance.

Graded Evidence Grade B because "tacit acceptance after one month" is derived from Judicial Interpretation Article 43 and regional judicial guidelines rather than express statutory wording. After submitting a written objection, continue reporting to work while explicitly stating that attendance is under protest; completely refusing to report to work risks dismissal for job abandonment. If the demotion is subsequently adjudicated unlawful, dismissal constitutes illegal termination subject to double statutory severance (2N, Chapter 19, Rule 6); if the transfer is deemed reasonable, severance is forfeited. If major objective conditions change and parties fail to agree on modifications, employers may terminate contracts with 30 days' advance notice or 1 month's salary in lieu of notice (N+1, Chapter 19, Rule 5). Recovering docked wages is covered in Chapter 7, Rule 2. Benefit is categorized as Moderate.

全国人大常委会 (2012 修正). 劳动合同法（第三十五条，第三十八条第一款第二项，第四十条第三项，第四十六条第一项）. https://fgk.chinatax.gov.cn/zcfgk/c100009/c5193025/content.html（国家税务总局政策法规库转载）；最高人民法院 (2020). 关于审理劳动争议案件适用法律问题的解释（一）（法释〔2020〕26 号，第四十三条）. https://www.court.gov.cn/fabu/xiangqing/282121.html；北京市高级人民法院、北京市劳动人事争议仲裁委员会 (2024). 关于审理劳动争议案件解答（一）（京高法发〔2024〕534 号，第 59 问、第 60 问、第 61 问）. https://www.beijing.gov.cn/zhengce/fygfxwj/202405/t20240530_3699652.html；全国人大常委会 (2007). 劳动争议调解仲裁法（第四十三条）. https://rsj.ankang.gov.cn/Content-2150407.html（安康市人力资源和社会保障局转载）；国务院 (2006). 诉讼费用交纳办法（国务院令第 481 号，第六、十三条）. https://www.gov.cn/ziliao/flfg/2006-12/29/content_483682.htm