I signed the labor contract, but the company didn't stamp it and didn't give me a copy. This contract is invalid. The labor contract will take effect only after the employer and the employee sign or seal the text of the labor contract.

Article 16 of People's Republic of China (PRC) Labor Contract Law? A labor contract shall be reached through consultation between the employer and the employee, and shall come into effect after the text of the labor contract is signed or sealed by the employer and the employee.

The text of the labor contract is held by the employer and the employee respectively.

Extended data:

Article 9 of People's Republic of China (PRC) Labor Contract Law? When employing workers, the employing unit shall not detain the workers' resident identity cards and other documents, and shall not require the workers to provide guarantees or collect property from them in other names.

Article 84 of People's Republic of China (PRC) Labor Contract Law? If the employing unit violates the provisions of this law and distrains the employee's resident identity card and other documents, the labor administrative department shall order it to return the employee within a time limit and punish it in accordance with relevant laws and regulations.

If an employing unit, in violation of the provisions of this Law, collects property from laborers by way of guarantee or other names, the labor administrative department shall order it to be returned to the laborers within a time limit and impose a fine of not less than 500 yuan but not more than 2,000 yuan per person; If it causes damage to workers, it shall be liable for compensation.

If the employee dissolves or terminates the labor contract according to law, and the employer detains the employee's files or other articles, it shall be punished in accordance with the provisions of the preceding paragraph.

Baidu Encyclopedia-People's Republic of China (PRC) Labor Contract Law