He received seven nominations for Best Cinematography at the Hong Kong Film Awards, winning with Chasing the Dragon (2017) and Project Gutenberg (2018).

[1] He studied at Pui Ying Secondary School [zh] and joined the photography club in his freshman year, which sparked his interest in cinematography.

[7] In 2010, Kwan served as the cinematographer for Pang Ho-cheung's romantic comedy film Love in a Puff, starring Shawn Yue and Miriam Yeung.

[25] Richard Kuipers, writing for the Chicago Tribune, acknowledged Kwan's cinematography with his "beautifully composed widescreen images" in the film.

[32] Lan Tsu-wei, writing for Liberty Times, referred to Kwan as the key figure behind the scenes, whose ability to capture the actors' emotions enhanced the film's tension.

[35] Edmund Lee of South China Morning Post appreciated Kwan's development of a "vibrantly coloured" film with tones of both humour and sadness;[36] while Lau Ying-tsz of HK01 noted that Kwan infused fresh romantic elements with absurdity in his debut film, resulting in an innovative and uniquely chaotic vibe.

[49] Edmund Lee of the South China Morning Post offered a rather critical review, panning Kwan and Wong for missing the suspense and emotional tones of the film and steering the story towards "a familiar parade of shoot-outs and car chases";[50] Richard Kuipers, writing for Variety, also noted the film's lack of suspense but praised the "slickly shot" widescreen visuals.

[52] Kwan made his second solo directing effort with the action film I Did It My Way, featuring Andy Lau, Gordon Lam, and Eddie Peng,[53] which was produced in 2022 and released theatrically in 2024.

[57][58] Noel Wong stating in Free Malaysia Today that "as soon as bullets start flying, good camerawork goes out the window", criticising the plot, character motivations, and "stumbling" cinematography;[59] Edmund Lee of South China Morning Post bashed on the "foolish" visuals and the nonsensical script, which "turns the film into an unintended comedy";[53] while Simon Abrams of RogerEbert.com noted that Kwan shifted his usual focus on actors to deliver a "formulaic cops-and-crooks plot".