Yip Kok Yat was a disciple of the esteemed calligrapher Zheng Yi Feng (1911-1989), who traced his lineage to Li Jian's (1882–1956) tutelage, with Li himself apprenticing under the renowned late Qing artist Li Ruiqing (1867-1920). Yip played an active role in various societies and associations, contributing significantly to the local art scene. Serving on the committee of the Calligraphy Society of Malaysia and the Malaysian Contemporary Chinese Painting and Calligraphy Association, among others, he played a pivotal role in organizing art activities and served as a judge in multiple calligraphy competitions. Yip exhibited his works at the Jianjing Art Museum, Beijing Normal University (2017); Beijing Federation of Literary and Art Circle Exhibition Hall (2018); Singapore Cultural Centre (2018); and “The Exhibition of International Alliance of Calligraphy & Culture,” Kuala Lumpur (2005).

本地著名书法家叶国日是被誉为百体书法家的郑一峯（1911-1989）之入室弟子。从中国南来的郑一峯出生自书香世家，祖父是清朝进士，书法师承李健（1882 – 1956）即清道人李瑞清（1867-1920）的得意门生。叶国日活跃于各大书画协会及团体，曾任马来西亚书艺总会理事、马来西亚国际现代书画联盟总会理事及评审委员等，并帮助筹办多场书法比赛及活动，如“笔风墨彩” 2019年名家书画交流展及第二届郑一峰杯书法精英赛（2019），积极推广本地书法文化，并且担任多场赛事的评审。他曾参与过多项国际书法大展，如“南溟燕归”（2017及2018），展览先后在北京师范大学坚净美术馆，及中国文艺家之家展览馆举行；“第十三届国际书法交流新加坡大展”，新加坡（2018），以及“国际文化书法联盟大展”，吉隆坡（2005）。叶国日结合灵动草书及质朴魏碑的独特书法风格，成功赢得了中国书法家协会副会长陈洪武先生的高度肯定。其作品收录于马来西亚书艺协会珍藏馆、《马来西亚当代书法家专页》、《第八届沈慕羽杯书法精英赛作品精选集》及《墨缘–缅怀孙中山先生书法作品合辑》。