Nanjing Keya Company was founded in 1993, the initial establishment of Sino-foreign joint venture, the investors are Jiangsu Province Science and Technology Commission, Macao East Asia Industrial Company, and the Ministry of Chemical Industry Chemical machinery Institute of Nanjing Extrusion Machinery Research Institute. The main products of the company are SHL-60 building block type twin screw extruder unit, which is developed by Liu Guangzhi, director of Nanjing Extrusion Machinery Research Institute, China's first replacement import, commercial twin screw extruder unit, the project won the National Science and Technology Progress Award in 1990, which opened the first domestic twin screw extruder unit.