Can Chengdu social security medical insurance be bought separately? how much is it?

Chengdu social security and medical insurance can be bought separately. According to Article 23 of the Social Insurance Law, employees shall participate in the basic medical insurance for employees, and the employer and employees shall jointly pay the basic medical insurance premium in accordance with state regulations. Individual industrial and commercial households without employees, part-time employees who have not participated in the basic medical insurance for employees and other flexible employees can participate in the basic medical insurance for employees, and individuals pay the basic medical insurance premium in accordance with state regulations. Therefore, individuals in Chengdu can buy medical insurance separately. Both urban workers' medical insurance and urban and rural residents' medical insurance can be insured separately. I apply to the social security bureau and the town employment and social security service center with valid identity documents.