Guangxi University, Guangxi University, Guangxi University, Guangxi University, affiliation not provided to SSRN, affiliation not provided to SSRN, Guangxi University, Tianjin University - Tianjin University of Science and Technology, Guangxi University, Guangxi University, Guangxi University - Key Laboratory of Clean Pulp & Papermaking and Pollution Control of Guangxi and Guangxi University - Key Laboratory of Clean Pulp & Papermaking and Pollution Control of Guangxi