English: Since the early 20th century, numerous Japanese scholars have visited Hainan for natural resource surveys. From 1938 on, Taihoku Imperial University professor Tanaka Tyozaburo collaborating with Odashima Kijiro published "A Census of Hainan Plants". Subsequently, professors Hirasaka Kyosuke and Kawaguti Siro from Taihoku Imperial University conducted a preliminary zoological exploration in July, 1940.