William Cheung or Cheung Cheuk Hing (張卓慶, pinyin: Zhāng Zhuóqìng), born October, 1940, is a Chinese Wing Chun kung fu practitioner and currently the Grandmaster of his lineage of Wing Chun, entitled Traditional Wing Chun (TWC). He also heads the sanctioning body of TWC, the World Wing Chun Kung Fu Association.

Cheung attained a Bachelor of Economics from the Australian National University, after graduating from secondary school in Hong Kong. Cheung is a certified Doctor of Chinese Medicine under the Chinese Medicine Registration Board of Victoria, and a member of the Australian Chinese Traditional Orthopaedics Association Inc. He has also been invited as a Guest Professor to Foshan Sports University (China), and as a Senior Research Professor of the Bone Research Department to Beijing Chinese Medical University (China).

In 1951, at the age of ten, Cheung started his training in Wing Chun Kung Fu under the late Yip Man. According to Cheung, it was from 1954 to 1958 that he was a live-in student of Yip Man and inherited the complete system of Traditional Wing Chun.

Alfredo Angulo López (born August 11, 1982 in Mexicali, Baja California, Mexico) is a Mexican professional boxer and the former interim WBO Light Middleweight Champion. Angulo also participated in the 2004 Summer Olympics for Mexico. Alfredo is signed to Oscar de la Hoya's Golden Boy Promotions.

He qualified for the Olympic Games by ending up in second place at the 1st AIBA American 2004 Olympic Qualifying Tournament in Tijuana, Mexico. At the Olympics Angulo lost to Andy Lee, by a score of 38:23. Angulo also has an amateur win over WBO Light Welterweight champion Timothy Bradley.

He has sparred with some of the best fighters in the world, which include Contender Jesus Soto Karass, Quadruple World Champion Roy Jones Jr., three-time Welterweight champion Antonio Margarito, and two-time Light Middleweight champion Fernando Vargas.

Alfredo Angulo is an all-action fighter, who turned professional in Arizona. The Mexican was considered by many boxing analysts to be the next Light Middleweight World Champion. On 17 May 2008 he defeated Richard Gutierrez inside of five rounds to take his professional record to 13 wins, 10 by way of knockout. On October 4, 2008, Angulo defeated Ukraine's Andrey Tsurkan (26-3, 17 KO). Angulo, from the beginning of the round was relentless, averaging over 100 punches per round. He stopped Tsurkan in the 11th round when referee Tony Krebs stepped in. Angulo was scheduled to fight former champion Ricardo Mayorga on February 14, 2009. However, Mayorga pulled out ten days before the fight after demanding a larger purse. Angulo fought former NABO light Welterweight champion Cosme Rivera as a replacement and defeated him by fifth round technical knockout.

Yip Man (1 October 1893 – 2 December 1972), also spelled as Ip Man, and also known as Yip Kai-Man, was a Chinese martial artist. He had several students who later became martial arts teachers in their own right, including Bruce Lee.

Yip was born to Yip Oi-dor and Ng Shui, and was the third of four children. He grew up in a wealthy family in Foshan, Guangdong, and received a traditional Chinese education. His older brother was Yip Kai-gak, his older sister was Yip Wan-mei and his younger sister was Yip Wan-hum.

Yip started learning Wing Chun from Chan Wah-shun when he was 13. Since Chan was 70 at the time, Yip was Chan's last student. Due to his teacher's age, Yip learned most of his skills and techniques from Chan's second oldest disciple: Ng Chung-sok. Chan died three years after Yip's training started and one of his dying wishes was to have Ng continue teaching Yip.

At the age of 15, Yip moved to Hong Kong with help from his relative Leung Fut-ting. One year later, he attended school at St. Stephen's College—a secondary school for wealthy families and foreigners living in Hong Kong. During Yip's time at St. Stephen's, he saw a foreign police officer beating a woman and Yip intervened. The officer attempted to attack Yip, but Yip struck him down and ran to school with his classmate. Yip's classmate later told an older man who lived in his apartment block. The man met with Yip and asked what martial art Yip practised. The man told Yip that his forms were "not too great". The man challenged Yip's Wing Chun against the man in chi sao (a form of training that involves controlled attack and defence). Yip saw this as an opportunity to prove that his abilities were good, but was defeated by the man after a few strikes. Yip's opponent revealed himself to be Leung Bik, Chan Wah-shun's senior and son of Chan's teacher, Leung Jan. After that encounter, Yip continued learning from Leung Bik.

Daniel Arca Inosanto (born July 24, 1936) is a Filipino-American martial arts instructor from California who is best known as a student of the late Bruce Lee and renowned authority on Jeet Kune Do, Filipino Martial Arts, and Silat.

Dan Inosanto teaches The Art and Philosophy of Jeet Kune Do, Filipino Martial Arts, Shoot Wrestling, Brazilian Jiu Jitsu, Muay Thai, Silat, mixed martial arts and other arts at his Marina del Rey, California school, the Inosanto Academy of Martial Arts. He received a shodan from and was an instructor for Ed Parker in American Kenpo Karate before becoming a student of Bruce Lee. Inosanto is one of three people allowed by Bruce Lee to teach his Martial Arts system (Taky Kimura and James Yimm Lee being the other two), and the only one to be given Instructorship in Bruce Lee's Jeet Kune Do of the third level. Inosanto also studied with dozens of martial arts masters elsewhere in the United States, Southeast Asia, and Europe, including Johny Lacoste (Kali, or Kamot Lihok, lit. "Hand Movement"), and Chai Sirisute (Muay Thai). After Bruce Lee's death, he has become the principal spokesperson and historian for Jeet Kune Do. He has had minor roles in a number of movies, including Bruce Lee's uncompleted last film Game of Death (1972). During this time period (1967–75), he also taught physical education at Malaga Cove Intermediate School in Palos Verdes Estates, California.

Emin Boztepe (born 17 June 1962) is an American martial artist of Turkish origin who held German nationality prior to naturalization. He first came to prominence for his fight in 1986 with noted Wing Chun practitioner William Cheung, and he continued to gain attention in the 1990s with a public challenge of the Gracie family. He was a notable member of Leung Ting's Wing Tsun organisation until 2002, when he formed his own organisation.

Boztepe was born in Eskişehir, Turkey, the second of six children. At the age of four, his family, originally from Bağlıca village of Emirdağ, moved to Germany. According to Boztepe, his early days in Germany were difficult due to his Turkish heritage—he was a constant a target for racial insults and, more often than not, verbal abuse would escalate into physical abuse. Martial arts became something of a necessity and his father urged him to begin training. Boztepe recalled, "Germany was not the healthiest place for a young Turk in those days of growing racism and neo-Nazi movements." He claimed to have been in over 300 street fights, many of them a result of this period, though he also claimed to have not started any of these fights.