Northeast Forestry University, Northeast Forestry University, Northeast Forestry University, affiliation not provided to SSRN, affiliation not provided to SSRN, Chinese Academy of Sciences (CAS), Chinese Academy of Sciences (CAS), affiliation not provided to SSRN, Northeast Forestry University, affiliation not provided to SSRN, affiliation not provided to SSRN, affiliation not provided to SSRN, affiliation not provided to SSRN, affiliation not provided to SSRN, affiliation not provided to SSRN, Chinese Academy of Sciences (CAS), Northeast Forestry University, Chinese Academy of Sciences (CAS) - State Key Laboratory of Frozen Soil Engineering and affiliation not provided to SSRN