A joint school mock exam was organized by the Liberal Studies Department in conjunction with the Hong Kong Economic Journal and Aberdeen Technical School on 2的March.Due to the epidemic, participants needed to return to their original school to take the test. All questions are written by the Hong Kong Economic Journal. And it was our great honor to invite Ms. Cheng WS from Aberdeen Technical School and Mr. Yim YN, Director of the General Education Department of the Hong Kong Economic Journal to be our invigilators, as well as explaining test questions. Our school L. S. Panel Head Mr. Mak CW was sent to Aberdeen Technical School and presided over the examination. In order to overcome the difficulties and strive for the best results in HKDSE, it is hope that mock test would give students a feel of the real exam and improve their problem-solving abilities.