No.272 Qiantang District Popularity Ranking Hangzhou Zhejiang No.8 Optical Instruments No.11 Heating Supply Technology No.13 Composite Materials No.14 Te Zhong Xian Wei Ji Fu He Materials No.18 Compositing Materials No.22 Jing Mi Ji Xie Ling Components No.24 Instrument Equipment No.28 Precision Instruments No.37 Ke Xue Instruments No.43 CNC No.57 Precision Machinery No.68 Materials R&D