I am engaged in the solar energy industry. Blue film is also called solar heat absorbing coating. At present, there are mainly four manufacturers of blue film in China, and the best one is Zhongke Baibo. Zhongke Baibo is a high-tech company jointly invested by Guangzhou Energy Research Institute of Chinese Academy of Sciences and Dujiangyan Municipal Government of Sichuan Province. Its pornographic films include Bochum and Earl series. At present, Bojue's domestic universal blue film adopts the patented technology of Guangzhou Energy Research Institute of Chinese Academy of Sciences. The width of blue film can reach 1250mm, and it can resist salt fog for more than 72 hours, which has not been done in China at present. Zhongke Baibo invested nearly 200 million yuan in production equipment, and even a screw was imported from Germany, which ensured the stability of product production. You can search on Alibaba.
For some people, foreign pornographic movies are better than domestic ones. A few years ago, it was true. In the past two years, domestic pornographic films have developed rapidly, and their technology has improved a lot, and their performance is equivalent to that of foreign pornographic films. Foreign pornographic films are nearly twice as expensive as domestic ones. Personally, I don't think it is necessary to buy foreign pornographic movies.