Since Longde company entered the market of filter paper in 2014, depending on the international first class production equipment, advanced manufacturing technology, strong R&D capability, excellent product quality and excellent after-sale service has established a solid relationship with more than 200 large and medium-sized filter enterprises including a number of well-known enterprises at home and abroad such as MANN+HUMMEL, Fleetguard, TOYOTA BOSHOKU, AVIC Xinhang Pingyuan filter Co.,Ltd.,Zhejiang universe filter Co.,Ltd.,Hebei Yil Plastic Group Co.,Ltd.,Guangdong Tora Group Boshi ldustries Ltd.,Zhejiang Santian Filter Co.,Ltd.,Zhejiang Weitai Automobile Parts Co.,Ltd.,Soyo Group China Golden Haiye Auto Parts Manufacturing Co.,Ltd. and so on.