Chih-Hsu Ou-I is not mentioned in the provided text about sinologists.
The provided text is a list of sinologists, scholars who study China, primarily through its language, literature, and history. The field of sinology, historically focused on philology and Chinese language and literature, has expanded to include history, epigraphy, and other subjects. The list enumerates sinologists from various countries around the world, including Australia, Austria, Belgium, Canada, China, the Czech Republic, Estonia, France, Germany, Greece, Hungary, India, Ireland, Italy, Japan, Kazakhstan, Moldova, the Netherlands, New Zealand, Norway, Poland, Portugal, the Philippines, Qatar, Russia, Singapore, Slovenia, Spain, Sweden, Switzerland, Thailand, Turkey, the United Kingdom, and the United States. Each entry typically includes the scholar's name, and sometimes their birth and death dates or brief biographical details. The text does not contain any information about Chih-Hsu Ou-I.