Where are the solar manufacturers mainly concentrated?

The generation of solar energy is related to its birthplace. 1993, there were only four vacuum tube manufacturers in China, including Tsinghua and Pu Tian in Beijing, Yanglide Company founded by Mr. Fan Weihai in Taian, Shandong, and Huayang in Yangzhou, Jiangsu. In recent years, most vacuum tube production has been concentrated in Jiangsu, Zhejiang and Shandong provinces, which has led to the emergence of solar energy manufacturers. On a small scale, Haining, Zhejiang and Taian, Shandong are almost the most, limited to many manufacturers, and of course they are mixed.