Acknowledgments: This work is supported by National Natural Science Foundation of China (No. 61673008, No. 62062018), Project of High-level Innovative Talents of Guizhou Province ([2016]5651), Key Project of Hunan Education Department (17A181), University Science and Technology Top Talents Project of Guizhou Province (KY[2018]047), Foundation of Science and Technology of Guizhou Province ([2019]1051), Guizhou University of Finance and Economics(2018XZD01), Guizhou Key Laboratory of Big Data Statistical Analysis (No.[2019]5103). The authors would like to thank the referees and the editor for helpful suggestions incorporated into this paper.