It’s not just trying to build solar capacity, it’s building all solar capacity in the planet. Solar photovoltaics is essentially exclusively manufactured in China, as are e.g. EV batteries. China is definitely the leading country when it comes to solar and batteries, while maybe the peak of wind technology is in Europe. They’re also innovating on nuclear and they approved to build the largest hydroelectric generation plant in the planet, producing twice as much as the current largest (three gorges dam, also in China?.