diff --git a/app/services/courses_service.rb b/app/services/courses_service.rb
index 274b78e50..c2944fed5 100644
--- a/app/services/courses_service.rb
+++ b/app/services/courses_service.rb
@@ -744,7 +744,6 @@ class CoursesService
                      :better_students => better_students,
                      :active_students => active_students,
                      :message => "",
-                     :dynamics => latest_course_dynamics,
                      :course_student_num=>course ? course.members.count : 0,
                      #:time_from_now=> distance_of_time_in_words(Time.now, latest_course_dynamic[:time].to_time) << "前",
                      :time_from_now=>time_from_now(latest_course_dynamic[:time].to_time), #.strftime('%Y-%m-%d %H:%M:%S').to_s,