College of Economy and Management, China University of Petroleum, Dongying City,China
Sunshine Village and Town Bank, Qianguo Country, Songyuan City, China
College of Economy and Management, China University of Petroleum, Dongying City,China
Copyright © Jinfeng Sun, Xuesheng Zhou, Qinzhi Liu et al. This is
an open access article distributed under the Creative Commons Attribution
License, which permits unrestricted use, distribution, and reproduction in any
medium, provided the original work is properly cited.