Can ICBC pay social security only for half a year?

I can't. According to the Social Insurance Law, social security is paid on time every month, not just half a year. You can deposit social security fees in your account for half a year, so that social security fees can be deducted automatically every month. The social security electronic payment system is not limited by time and region, and supports individual customers to pay employee pension insurance, employee medical insurance and supplementary medical insurance premiums on mobile phones, computers and self-service terminals of ICBC outlets.