What is the first concert on May Day?

The Mayday 168 concert is their first large-scale concert since their debut. Taipei City Gymnasium witnessed the moment when their dreams came true. The sound of "Mayday" resounded through the stadium, and A Xin shouted happily, "We really did it". It was the summer vacation of 1999, the most youthful and tender May Day, and it was an unforgettable summer spent with you.