In the film, Bruce Lee's character sets out to avenge the death of his teacher Huo Yuanjia (Fok Yuen Gap) and at one point during the film, the Chinese Wushu students are called "sick men of Asia" by their rivals. In real life, Huo Yuanjia was a legendary Wushu martial artist and in 1901, accepted the challenge of a Russian fighter who called all Chinese people "sick men of Asia".