As for large power plants, I'm not sure, but there are certainly small ones, like those used by the Hongshanzui Border Defense Company to generate its own electricity. Even if they are not big, they are still relatively big. big
Secondly, it may be better to settle in Tibet than in Xinjiang, because it is not only about the duration of sunshine, but also a very important to take into account, namely radiation. intensity, i.e. the energy value of radiation per square meter.
In addition, photovoltaic solar cells are still relatively expensive, so it is still difficult to manufacture them in large quantities.
Secondly, when building a power plant, it is also necessary to deploy a power grid to return electricity, which is also a big problem.