Tio Ie Soei (simplified Chinese: 赵雨水; traditional Chinese: 趙雨水; pinyin: Zhào Yǔshuǐ; Pe̍h-ōe-jī: Tiō Í-súi; 22 June 1890 – 20 August 1974; also known by the pen name Tjoa Pit Bak) was a peranakan Chinese writer and journalist active in the Dutch East Indies and Indonesia. Born in the capital at Batavia (now Jakarta), Tio entered journalism while still a teenager. By 1911 he had begun writing fiction, publishing Sie Po Giok – his first novel – that year. Over the next 50 years Tio wrote extensively in several newspapers and magazines, serving as an editor for some. He also wrote several novels and biographies, including ones on and Lie Kim Hok.