How about Qingdao Kamanlong Door and Window Technology Co., Ltd.

Not bad.

Qingdao Kamanlong System Doors and Windows is a comprehensive door and window enterprise focusing on the design, R&D and manufacturing of doors and windows. Product quality is stable, green and environmentally friendly, and transportation is flexible and fast.

Qingdao, also known as Daocheng, Qindao and Jiaoao, is a prefecture-level city, sub-provincial city, independent planned city, and megacity under the jurisdiction of Shandong Province, China.