Does the subject want to ask "How many power plants are there in downtown Shijiazhuang"? Six.

1. There are four power plants of Dongfang Thermal Power in Shijiazhuang, namely the first, second, third and fourth thermal power plants.

2. Shijiazhuang Thermal Power Plant of the Provincial Electric Power Company.

There is a Yongtai thermal power plant in the development zone.