As long as the employee's income is not lower than the local minimum wage, the enterprise will not violate the rules. Enterprises can use any reason to explain why other people's income is higher than yours, so we must first weigh whether there is room for improvement in this position in case there is a more suitable position after leaving.
1 year later, you can first apply for arbitration to the local labor and social security bureau (labor dispute arbitration tribunal) on the grounds that your company does not sign a labor contract or pay social insurance premiums, and claim your rights and interests. As long as the arbitrators of the arbitration tribunal are not stupid officials, you are sure to win 100%.
Those who are dissatisfied with the arbitration results will bring a lawsuit to the court as a labor dispute.