1. Salary of weak current engineer in Beijing: the average salary is 4747 yuan/month, the minimum salary is 1272 yuan/month, and the maximum salary is 9000 yuan/month.
2. Salaries of weak current engineers in Shanghai: the average salary is 4639 yuan/month, the minimum salary is 1650 yuan/month, and the maximum salary is 18000 yuan/month. Weak current engineer refers to the hardware engineer engaged in communication, monitoring and security related to the above power system.