Chia Hoy Sai received his formal training at the Nanyang Academy of Fine Arts, Singapore (1968-1969). After returning to Malaysia, he spent fifteen years working in publishing as a book illustrator before devoting himself fully to painting. He later became a full-time artist, working primarily in oil, pastel and charcoal, while mentoring younger artists including Lui Cheng Thak.

From 2000 onwards, Chia's practice was shaped by extensive travels across Southeast Asia. Solo journeys through remote regions of Sarawak, Laos, Cambodia, the Philippines and Myanmar inspired a body of work depicting rural life, indigenous communities in traditional attire, and the vibrant abundance of tropical fruits. In 2009, he collaborated with Soka Gakkai Malaysia on the touring exhibition "The Differing Faces of Southeast Asia", which travelled to fourteen locations across Malaysia. His solo shows were held at Wisma Saberkas, Sarawak (2002), Philippine Chinese Education Research Center (2006), Galeri Shah Alam, Selangor (2011), and PINKGUY Gallery, Kuala Lumpur (2022 & 2026).

谢惠载1968至1969年受训于新加坡南洋美专。返马后,他曾在出版界从事书籍插画工作十五载, 其后转而传授绘画,四十余岁全身投入绘画创作,成为职业艺术家,专攻油画、粉彩及炭笔。2000 年后,足迹遍及东南亚,深入砂拉越、寮国、柬埔寨、菲律宾及缅甸偏远乡野,由此激发一系列描绘乡村生活、原住民族传统服饰及热带水果丰饶景象之作。2009年,与马来西亚创价学会合作举办巡回展《东南亚民族风采》,足迹遍及全马十四地。曾于砂拉越(2002)、菲律宾华教中心 (2006)、雪兰莪莎亚南画廊(2011),以及吉隆坡PINKGUY画廊举办个展(2022、2026)。