Dongincheon High School General Alumni Association-only membership notebook application. You can use the erp homepage for rotating alumni together with each meeting-specific application such as jockey. The main function is 1. You can use the pc homepage linked with the smartphone application. 2. You can create a separate application for each meeting, such as each jockey under the General Alumni Association. (General Alumni Association + each jockey + local meeting + club). Create a separate ap