When the contract expired, the company did not renew it, but the social security was paid.

Legal analysis: it is against the regulations to dissolve or terminate the labor contract. The employing unit shall issue a certificate of dissolution or termination of the labor contract at the time of dissolution or termination, and go through the formalities for the transfer of files and social insurance relations for the workers within 15 days. Laborers shall handle the work handover according to the agreement of both parties. If the employing unit should pay economic compensation to the workers in accordance with the relevant provisions of this law, it should pay it when the work handover is completed.

Legal basis: Article 48 of the Labor Contract Law of People's Republic of China (PRC), if the employer dissolves or terminates the labor contract in violation of the provisions of this law, and the employee requests to continue to perform the labor contract, the employer shall continue to perform it; If the laborer does not request to continue to perform the labor contract or the labor contract cannot be continued, the employer shall pay compensation in accordance with the provisions of Article 87 of this Law.