What should I do if I go to work at the construction site to buy social security?

There is group insurance for work-related injuries in construction sites. Taking Xiamen as an example, according to the Measures for Migrant Workers in Construction, Mining and Stone Processing Enterprises to Participate in Work-related Injury Insurance (Trial), before the project starts, the local tax department will handle work-related injury insurance for all employees in the construction site of the project under construction.

Construction enterprises handle work-related injury insurance for employees in the construction site of projects under construction, and the payment base is 15% of the total construction contract cost as the total labor wages, and it is paid at the rate of 1%, that is, the work-related injury insurance premium is paid at the rate of 1.5‰ of the total construction cost. The total payment amount shall be approved by the local tax authorities, and a payment bill shall be issued, which shall be paid by the general contractor to the local tax authorities in one lump sum before the project starts.

Further reading: How to buy insurance, which is good, and teach you how to avoid these "pits" of insurance.