Sunny Cheung graduated from the Hong Kong Academy for Performing Arts in horn performance under the tutelage of Joe Kirtley and Johnny Yam. He won the HKAPA's Concerto Trial in 2003. From 2003 to 2005 he performed in Asia and Europe in performances organized by the Hong Kong Tourism Board. He has performed with the Macao Orchestra, Hong Kong Symphonia and the Opera Hong Kong Orchestra. He has performed with numerous Hong Kong and Japanese celebrities and composers including Joseph Koo, Chiu Tsang-hei, Alan Tsui, Hacken Lee, Sammi Cheng, Koji Tamaki and X-Japan YOSHIKI, among others. Sunny Cheung has been performing with City Chamber Orchestra of Hong Kong since 2012 and became a tutti horn player in 2021.