[1] At the 2012 Summer Olympics, he competed in the Men's sabre, but was defeated in the last 32 by Áron Szilágyi who went on to win gold medal in the event.

He underwent surgery again, and planned to compete at the 2017 SEA Games with hopes of winning a silver or gold medal, but the condition of his knee continued to worsen, and he announced his retirement from fencing in February 2017.

[6] As the Malaysian team had no other sabre fencers at the time, he did not have a training partner before the games, and suffered four back-to-back defeats, thus failing to advance to the semi-finals.

[7] Three of Yu's students represented Malaysia at the 2023 SEA Games in Phnom Penh: Teh Zi Hao, Keane Leong, and Resha Shaveena Sabaratnam.

[8] Yu graduated from Universiti Putra Malaysia with a bachelor of science in human resource development in 2016.