Dongao is a large non-governmental enterprise integrating science, industry and trade. With workshops of up to 18000m2, the Company has multiple domestically advanced extrusion
prduction lines and assembly processing equipment, and is characterized by abundant technical strength and fabrication improvement. It is mainly engaged in the development, production and marketing of environmental decoration material series products and dedicated to opening up a wide market of new materials.

Since establishment in 1993, Dongao Enterprise has been tapping new products and markets, and distribution points have been set up in multiple domestic cities. Its products are well received in overseas markets such as Southeast Asia, Middle East, Europe and America, with production and sale showing good trends. The product has passed the inspection organized by the National Inspection Center of Chemical Building Materials, and won the prize of “Excellent Environmental Product” recommended by China International Environmental Product Management Center.

is a brand registered by Dongao Enterprise. Happy Door macromolecule paint-free decoration materials are a new generation of environmental building material products, which are paint-free, free of formaldehyde and radiation pollution, and featured by high simulation, a wide range of styles and complete specifications. They include three great series products, namely interior door series, decorative line series and decorative plates, and are used for decoration of hotels, restaurants, offices, houses and clubs. They are optimal decoration materials, demonstrating grace, practicality, fashion and elegance.
Utilization of Happy Door macromolecule paint-free materials enables your house to be elegant and comfortable; employment of Happy Door environmental products can reduce the waste of forest resources, create more happiness for the mankind and leave more green for the world!
By sticking to the operating tenet of "quality first and customer superior", and following the operating idea of "pursuing excellence and making every effort to crate a famous brand", Happy Door People serve each customer sincerely, and construct a wonderful tomorrow!