There are errors in the author affiliations. The publisher apologizes for these errors. The correct affiliations are as follows:

XiaoShu Xu¹, XiBing Wang^2,3, YunFeng Zhang⁴, Rong Zheng^3,5

1 School of Foreign Studies, Wenzhou University, Wenzhou, Zhejiang, China, 2 School of Information Engineering, Yunnan Vocational College of Mechanical and Electrical Technology, Kunming, Yunnan, China, 3 Graduate School, Stamford International University, Suan Luang, Bangkok, Thailand, 4 Centre for Portuguese Studies, Macao Polytechnique University, Se´ Freguesias, Macao, China, 5 School of Education, Baoshan University, Baoshan, Yunnan, China.