Shaanxi University of Science and Technology, Shaanxi University of Science and Technology, Shaanxi University of Science and Technology, affiliation not provided to SSRN, Chinese Academy of Sciences (CAS) - Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences (CAS) - Northwest Institute of Eco-Environment and Resources, East China Normal University (ECNU), Chinese Academy of Sciences (CAS) - Northwest Institute of Eco-Environment and Resources, Shaanxi University of Science and Technology, Shaanxi University of Science and Technology, Shaanxi University of Science and Technology, Shaanxi University of Science and Technology, Northwestern Polytechnic University (NPU), Chinese Academy of Sciences (CAS) and affiliation not provided to SSRN