The reasons are as follows: According to Article 7 of the Labor Contract Law, "The employing unit establishes a labor relationship with the employee from the date of employment", no matter whether the employing unit signs a labor contract with the employee or not, as long as the employee starts to work, the employing unit establishes a labor relationship with the employee, and at the same time should bear the responsibility of paying labor remuneration and social security. Therefore, the date when the employer informs you to report for duty is the employment date. Whether the company arranges a job for you or arranges induction training for you, it belongs to the scope of employment and should be paid in accordance with laws and regulations.