What is the quality of doors and windows in Qingdao?

Qingdao is good. The quality of doors and windows is very good. According to the relevant information disclosed in the inquiry, the doors and windows of Qingdao Haoke are super wind-resistant, earthquake-resistant and torsion-resistant, and the four-way sealing design makes the frames and fans seamlessly overlap, which is heat-insulating and sound-proof, and more energy-saving. Adopt three-stage drainage system, which has better waterproof effect. And a variety of styles and shapes.