The scale of the State Grid is huge, and it cannot be generalized. Generally speaking, the power supply bureau in third- and fourth-tier cities is more cost-effective than first- and second-tier cities, and this concept is generally accepted. The development level of each city is similar, but the salary of the power supply bureau is not the same, among which the power supply bureau in Zhejiang, Jiangsu, northern Hebei and other places is better. If you take into account the housing prices in northern Hebei, the income level there can be described as staggeringly high. Of course, I myself would not choose to work in northern Hebei, because for most people in northern Hebei, they either choose to study in Hengshui, or they are surpassed by students in Hengshui in northern Hebei. 
The situation in Tianjin is special. The treatment of Tianjin Power Supply Bureau is quite good, and it can reach more than a dozen a year. In addition, the local wage level in Tianjin is relatively low, and the salary of the power supply bureau is particularly prominent, which is enough to meet daily living expenses. If you can get into the power supply bureau of Binhai New Area, it's like winning the jackpot. If you choose to work in the sixth district of the city, then the money you have saved for three years of work plus the 1 million yuan given by your parents is enough for a down payment. 
In fact, in many places, the work of the power supply bureau is quite idle. There are many comments on the Internet about the hard work and overtime work of the power supply bureau, but this is not the case with the seniors I have met. Although they complain about salary cuts, not enough money to spend, and a lot of exams, they never mention the hard work. One senior once missed work due to a long lunch break, but he was not punished for it. Working in the power supply bureau, 9 to 5 is the norm, and the situation of overtime on Saturdays and Sundays mainly occurs in the first year, except for special circumstances. Because of this, many employees choose to pursue a second career. The senior I knew opened a small company, which not only met the daily expenses, but also increased the value of wealth. 
To sum up, for those who aspire to work in the national grid, choosing which regional power bureau needs to consider a variety of factors. There are differences in the intensity of work, treatment and housing prices of power supply bureaus in different regions. Therefore, when choosing a place to work, we should weigh it according to our actual situation to make the most suitable choice.