Hong Kong Polytechnic University. Wuhan Automotive Polytechnic University Journal of Inner Mongolia polytechnic university Journal of Northwestern Polytechnical University Jorunal of Wuhan Automotive Polytechnic University Social science journal of Xiangtan polytechnic university Journal of Shenyang Polytechnic University Journal of Hefei Polytechnic University Journal of Henan Polytechnic University Northwestern Polytechnical University.