- ISO9001 The Shuanglian Group Corporation have being taken Liaoyang Pharmaceutical Machinery Co., Ltd. as the core, the Shuanglian brand products as the bond, and, development of science and technology, industrial production and trade together as one unit, has formed group enterprise in scale. The Group has one core enterprise, and eight subsidiary companies. There are staff and workers of 3, 000.www.shuanglian.net