YLXH Enterprises first was established in 1986,which owns a sales company named SHANGHAI YULONG VACUUM PUMP CO.,LTD, two pump factories named GUANGDE YULONG PUMP CO.,LTD & ZHEJIANG XINHUAN VACUUM PUMP CO.,LTD(Formerly named ZHEJIANG YUHUAN VACUUM PUMP FACTORY which established in 1986)and a motor company named SHANGHAI YULONG XINHUAN MOTOR MANUFACTURER CO.,LTD, was the member of CHINA VACUUM EQUIPMENT PROFESSIONAL ASSOCIATION and also one of the oldest and experienced pump manufacturer in China.