As a cinematographer, Kai has shot numerous features in Hong Kong and other parts of the world. In 2025, two of the Best Film nominees at the Hong Kong Film Awards were shot by him. They are The Way We Talk and Berlin Teddy-Award winner All Shall Be Well. He also shot the opening film of the 2025 Hong Kong International Film Festival, Pavane for an Infant. Kai’s other feature works include The Sunny Side of the Street; Drifting; Krabi, 2562; Suk Suk; Old Stone; Ek Hazarachi Note; Murmur of the Hearts; By the Time It Gets Dark; and Mundane History. Festivals including Berlin, Locarno, Rotterdam, and New Directors/New Films have selected features he shot. Kai has been nominated for national awards for Best Cinematography in Thailand, Canada, and at the Taipei Golden Horse Awards, and at festivals in Malaysia, India, and the Philippines.