E-mail:ytichen@ustc.edu.cn
Yingtian New Energy in Bengbu is still in business.
Personally, if you want to make a solar water heater, you can find people in the industry or attend more exhibitions. If you are an engineer, you can attend some seminars and buy some books. You can also have a look at the atlas of solar thermal utilization engineering. If you want to make some inventions or advanced patents, you must study them yourself or find some relatively young talents. If vacuum tube magnetron sputtering is used, only professionals can be found. I hope I can help you.