Is it okay to pay social security in another company and work in another company?

Of course. According to the information in People's Republic of China (PRC) (People's Republic of China (PRC)) Social Insurance Law, as long as another company is willing to pay individual and public contributions at its own expense. In order to standardize the social insurance relationship, safeguard the legitimate rights and interests of social insurance participants, enable citizens to share the fruits of development and promote social harmony and stability, the Social Insurance Law of People's Republic of China (PRC) is formulated according to the Constitution.