How much is the monthly employment fee for hiring a security company?

the charges for security services vary from place to place in China. in dongguan, the charge standard for security services stationed is based on the number of security guards stationed. the benchmark price is 3,5 yuan per person per month, and the security service company can negotiate with the entrusting party within the fluctuation range of not more than 3%. The security service company shall not charge any fees to the units that employ security guards by themselves and the security service companies and their subordinate security guards who come to our city for cross-regional operation.