SMIED is a trademark of China Buyang Group. China Buyang Group is a large group company specializing in the design, production and sales of security doors, steel entrance doors, high-end customized doors, fire doors, steel wooden doors, wooden door series, smart locks, stainless steel doors and real estate development.

Buyang Group covers an area of 600,000 square meters and employs more than 5,000 people. It has 1 1 an internationally advanced modern door industry production line, Buyang door industry research institute, and the first 5G Buyang intelligent factory in China.