College of Mathematics and Statistics Northwest Normal University Lanzhou ChinaDepartment of Mathematics and Physics Faculty of Education University of Gadarif Gadarif Sudan;
College of Mathematics and Statistics Northwest Normal University Lanzhou China;
College of Mathematics and Statistics Northwest Normal University Lanzhou China;
College of Mathematics and Statistics Northwest Normal University Lanzhou China;
College of Mathematics and Statistics Northwest Normal University Lanzhou China;
College of Physics and Electronic Engineering Northwest Normal University Lanzhou China;
Keller-Segel System; Chemotaxis; Global Bounded Solution; Singular Sensitivity;