1. School of Mathematics and Statistics, Southwest University, Chongqing, China
2. School of Mathematics and Statistics, Xi’an Jiaotong University, Xi'an, China
3. School of Mathematics and Statistics, Research Institute of Intelligent Finance and Digital Economics, Southwest University, Chongqing, China
4. Chongqing Key Laboratory of Big Data and Intelligent Computing, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing, China
5. Department of Mathematics, Texas A&M University at Qatar, Doha, Qatar