Holger Chen - Wikipedia [2] [3] He is also known popularly as the nickname Kuan Chang (Chinese: 館長; pinyin: Guǎnzhǎng; literally "gym manager") in Taiwan, [4] being the founder and CEO of G K Fitness Club (成吉思汗健身俱樂部; 'Genghis Khan Fitness Club') [5] As an actor, Chen made his first appearance as a cameo in the 2008 film Parking