[Miao Chen] Department of Mathematics, Central China Normal University, Wuhan, 430079, China
[Ping Li] School of Informations and Mathematics, Yangtze University, Jingzhou 434000, China
[Avy Soffer] Mathematics Department, Rutgers University, New Brunswick, NJ, 08903, USA
[Xiaohua Yao] Department of Mathematics and Key Laboratory of Nonlinear Analysis and Applications (Ministry of Education), Central China Normal University, Wuhan, 430079, China
