langfang jiulian machinery co., ltd. is a professional manufacturer of elevator safety components with advanced equipment, strong technical strength and complete testing methods. the company is located in yongqing industrial zone, langfang city, covering an area of ​​20,000 square meters, building area of ​​11,960 square meters, a total investment of 31.72 million yuan, and an annual production capacity of 40,000 units of elevator safety components.