Legal analysis: 1. During the employment period, the company requires employees to provide a copy of their ID cards, which is generally considered to be used to record employee files or register relevant system data. According to the provisions of the labor law, it is legal for the unit to require employees to provide a copy of their resident identity cards. The unit may collect a copy of the employee's ID card, but it cannot detain the original employee's ID card. 2. When an employee signs a labor contract with the company, the company has the right to ask for the employee's ID card to verify its information, or it can be responsible for filing the original ID card. As long as the unit does not detain the employee's ID card, it is legal.

Legal basis: People's Republic of China (PRC) Labor Contract Law.

Article 7 An employing unit shall establish labor relations with laborers from the date of employment. The employing unit shall establish a roster of employees for future reference.

Article 8 When employing workers, the employing unit shall truthfully inform the workers of their work contents, working conditions, workplace, occupational hazards, conditions for safe production, labor remuneration and other information required by the workers; The employer has the right to know the basic information directly related to the labor contract, and the employee shall truthfully explain it.

Article 9 The employing unit shall not detain the employee's resident identity card and other documents, and shall not require the employee to provide guarantee or collect property from the employee in other names.

Article 10 To establish labor relations, a written labor contract shall be concluded. If a labor relationship has been established and a written labor contract has not been concluded at the same time, a written labor contract shall be concluded within one month from the date of employment. If the employer and the employee conclude a labor contract before employment, the labor relationship shall be established from the date of employment.