North gate. Henan Hengda Wooden Door Factory is located in Feng Tang Central Primary School, Feng Tang Township, Huaiyang District, Zhoukou City, Henan Province. Henan Hengda Wooden Door Factory is a production and processing enterprise focusing on R&D and high-grade solid wooden doors. 1998 has developed steadily since its establishment. Now it has formed a sex production enterprise integrating R&D, processing and after-sales service.