SF with an average protein content of 45.2% and moisture content of 5.0% was purchased from Sanhe Hopefull Group Oil Grain Food Co. Ltd. (Beijing, China). ATP was purchased from Anhui Mingmei Minchem Co., Ltd. (Anhui, China). Other chemical reactants were analytical grade and obtained from Beijing Chemical Reagents Co. Ltd. (Beijing, China). The poplar veneer was obtained from Wen’an County with a moisture content of 8.0% (Wen’an, China)