On March 2, 2010 morning, China timber distribution association wooden door committee by "2010 national market, engineering wood door company product quality and after-sales service double promise integrity declaration" activities (hereinafter referred to as "double promise" activities) press conference in Beijing national convention center, from the state forestry administration, state quality inspection administration. Chinese consumer society, China timber distribution association and the leaders attending the event.

Changling (group) limited company general manager Mr. ChanZeXi changling door to door industry group in 2010 the company product quality and after-sales service to make double promised declaration of good faith. In the national market changling door by consumer consensus, five years of market operation, and the dealer to create the fault