Production notes

The idea of an Ip Man biopic originated in 1998 when Jeffrey Lau and Corey Yuen discussed the idea of making a film based on Bruce Lee's martial arts master. However, Paragon Films Ltd, the studio producing the proposed film, closed and the project was abandoned. Producer Raymond Wong decided to develop his own Ip Man film with full consent from Ip's sons, and had filmmakers head to Foshan to research Ip's life. Ip Chun, Ip Man's eldest son, along with martial arts master Leo Au-yeung, Jun Gao, and several other Wing Chun practitioners served as technical consultants for the film. Principal photography for Ip Man began in March 2008 and ended in August; filming took place in Shanghai, which was used to architecturally recreate Foshan. During filming, conflicts arose between the producers of Ip Man and filmmaker Wong Kar-wai over the film's working title. Wong, who had been developing his own Ip Man biopic, clashed with the producers after learning that their film would be titled Grandmaster Ip Man (Chinese: 一代宗師葉問), which was too similar to the title of Wong's film, The Grandmaster. Ip Man is the first film based on the life of Ip Man. It also marks the fourth film collaboration between director Wilson Yip and actor Donnie Yen. The two also reunite with co-star Simon Yam after 2005's SPL: Sha Po Lang. The screenplay for Ip Man was written by Edmond Wong, the son of film producer Raymond Wong. Wong was the screenwriter of Yip and Yen's second collaboration, 2006's Dragon Tiger Gate. Ip Man's eldest son, Ip Chun, his student Leo Au-yeung, and Changquan gold medalist To Yu-hang served as technical consultants for the film, providing advice on the film's story and martial arts choreography. The music for the film was provided by veteran Japanese composer Kenji Kawai, who also served as a composer on the 2006 film, Dragon Tiger Gate which featured Wilson Yip and Donnie Yen as director and actor respectively.

The film was originally conceived in 1998 when Jeffrey Lau and Corey Yuen first thought of the idea of making a film based on Ip Man's life. Donnie Yen signed onto the project, hoping to star as Ip, with Stephen Chow co-starring as Bruce Lee. Yen had signed the contract and received part of the acting fee. However, the studio producing the film closed, and the project was abandoned. In December 2007, plans to make a new Ip Man film were announced with the filmmakers researching Ip's life in Foshan. Producer Raymond Wong stated that the film would take on a similar look and feel to SPL: Sha Po Lang. On 26 February 2008, a press conference for the film was held in Foshan, where it was announced that Wilson Yip would be directing the film, while Yen would appear in the leading role as Ip. Lynn Hung, Lam Ka-tung, Simon Yam were announced to be appearing in supporting roles, while Sammo Hung would serve as the film's martial arts choreographer. Casting director Zhang Yan Bin spent three months casting actors in various roles for the film. He had completed casting during principal photography in March 2008.

Principal photography for Ip Man began in March 2008, and was completed by the end of August. A majority of the film focuses on events surrounding Ip Man that took place in Foshan in the 1930s and 1940s during the Sino-Japanese War. Since the buildings in modern-day Foshan are architecturally different from the ones of the film's period, the filmmakers decided to shoot the film in Shanghai. Filming first took place in a storeroom in the industrial district of Shanghai. Having difficulties scouting a cotton factory suitable for shooting, set designers decided to recreate one in the style of the 1930s. They spent weeks transforming an abandoned storeroom into the Zhen Hua Cotton Mill Factory, a 1930s cotton mill factory founded by Ip's friend Chow Ching-chuen (played in the film by Simon Yam) during the Sino-Japanese War. It was where Ip Man first taught Wing Chun openly to the public. Production designer Kenneth Mak included Western elements in his design, since Foshan, in earlier years, was a unique place where Chinese and Western cultures converged. Pillars were made to resemble English lampposts, and Western lighting, chairs, and tableware were also used. To convey the culture and feel of the time, the buildings were made to look obsolete and worn out. Apart from historical references, Mak also created a glass house which was used in a scene in the film.

The martial arts choreography was designed by Sammo Hung and veteran fight and stunt coordinator Tony Leung Siu-hung. Hung had previously collaborated with Wilson Yip and Donnie Yen as an actor in the 2005 film SPL: Sha Po Lang. He was hired as the choreographer mainly because of his experience on the 1978 film Warriors Two and 1982's The Prodigal Son, both of which involved Wing Chun. When asked how he would work with Yen to direct the action scenes, Hung replied matter-of-factly, "With my mouth." Yen described the role as the most emotionally and mentally difficult in his career. He spent months preparing for the role by going on a strict diet which consisted of eating one meal a day, training in Wing Chun, and learning more about Ip Man through his two sons. This was all in the hopes of portraying an erudite and cultured Ip Man, as well as bringing out the special traits of Wing Chun. Yen even went as far as to stay in character after filming, wearing his costume and changing his voice and movement patterns. While rehearsing a fight scene, Yen was reportedly injured when an axe wielder accidentally slashed the side of his left eye. Yen also had a masseur on set as he could not raise his right shoulder due to an injury. Japanese actor Hiroyuki Ikeuchi, who holds a black belt in Judo, found it "difficult" working under Hung's command. In one scene, he suffered a mild concussion after receiving four consecutive blows from celebrated fight co-ordinator Edward 'Sweco' Chan. Hung later praised Yen and Ikeuchi's performances in the film, even though Ikeuchi was not trained in Chinese martial arts and was not given a lot of complex moves.