Group 1 - The company is legally obligated to pay social insurance for employees from the start of their employment, with no exceptions [4] - Social insurance must be provided even during the probation period, as it is included in the labor contract duration [6] - The existence of a labor relationship is based on actual employment, not merely on a written contract [6] Group 2 - Agreements to waive social insurance contributions are invalid and pose legal risks for the company [6] - Companies cannot pay employees in cash to allow them to self-contribute to social insurance; contributions must be deducted and paid by the employer [6] - The law mandates that employers must inform employees of the details of social insurance contributions monthly [6] Group 3 - Compliance with social insurance obligations protects employee rights and helps the company mitigate legal risks [8]