Graham was making a joke. From Wiki (note the birth and death dates):
Wong Shun Leung (黃淳樑; 8 May 1935 – 28 January 1997)[a] was a Chinese martial artist from Hong Kong who studied wing chun kung fu under Yip Man (葉問)[1] and is credited with training Bruce Lee.[2][3][4][5] Wong reportedly won at least 60, and perhaps over 100, street fights against martial artists of various styles.[3][6][7][8][9] Due to his reputation, he came to be known as 'Gong Sau Wong' (講手王 or 'King of Talking Hands').[3][7][10][11][12] Wong recorded one instructional film entitled Wing Chun: The science of in-fighting.[13]