The 20th of every month. According to the query of the official website of the Shenzhen Municipal Government information shows that the Shenzhen social security after the 20th of each month to start deducting fees, Shenzhen Coman Medical pay social security time for the 20th of each month. Shenzhen Coman Medical Equipment Co., Ltd. was founded in 2002, is a world-renowned medical equipment manufacturer. The leading medical technology, products and services are widely used in the global medical institutions at all levels, medical education institutions, medical research institutions and social services and security institutions.