Shanghai social security unit suspended payment

Social security can be suspended under certain circumstances. The legal basis for paying social security is the existence of labor relations. If the labor relationship is terminated or dissolved, the salary will be stopped during the period when the labor relationship has not been established with other units.

If you are talking about "wage suspension" during the existence of labor relations, then this is not allowed.

Reference law:

Social insurance law

Article 58 An employing unit shall, within 30 days from the date of employment, apply to the social insurance agency for social insurance registration for its employees. If the social insurance has not been registered, the social insurance agency shall verify the social insurance premium it should pay.

Article 63 If an employer fails to pay social insurance premiums in full and on time, the social insurance premium collection agency shall order it to pay or make up within a time limit.

Further reading: How to buy insurance, which is good, and teach you how to avoid these "pits" of insurance.