Dayi group is located in the beautiful coastal city-Qingdao, enjoying an favorable location with convenient sea,land and air transportations.It is an earliest and most professional modernized group enterprise producing energy saving and environmental protection construction windows and doors with the integration of design,manufacturing,installation and service.Dayi group is one of the first batch enterprises had the honor of , and firstly passed ISO9001:2000 quality management system certificate and ISO14001:2004 environmental management system certificate.
The group leading products are: wood window scantling/glulam,solid wood window/door,aluminum clad window/door,wood clad window/door, alumimum wood complex window/door,thermal break window/door,upvc window/door,curtain wall.,etc.
Whenever and wherever Dayi windows and doors appears , all  the products filled our comprehensivel service. With advanced technology, judgematical marketing and management,DAYI group will adhere to the professionalism and high-quality service, and devote to create clean, safe, healthy and comfortable humanity living environment.