The exclusive report of sina door and window channel has developed from the extensive primary stage to more and more refined development. The door and window industry has entered an unprecedented critical period. 2021 has come to an end. Looking back on the door and window industry in this year, the rise of raw materials, the release of double carbon policy, the introduction of new national standards, and the 23rd China Construction Expo (Guangzhou)… The situation is still complex and changea...