Can Shenzhen's second-class social security be free?

Of course. According to the Social Insurance Law of People's Republic of China (PRC), the second-class social security personnel also enjoy medical examination services. Specifically, employees who participate in the second-class social security can enjoy the service of enterprise medical examination or free medical examination by the government, or they can choose to have a medical examination at their own expense in a medical institution. Moreover, many local governments regularly organize free medical examination activities to provide convenient medical examination services for the second-class employees of social security.