In 1919, the Taiwanese businessman Yu Muh-sheng opened the Muh Sheng Insect Collection. His collection contained many species that were later described by Japanese scholars, including Pazala eurous asakurae and Helcyra plesseni. His son Yu Ching-kin then took over, and in 1950 he expanded into the Japanese and American markets. During the peak period, they employed nearly 2,000 butterfly catchers plus hundreds of female factory workers working in processing.
台人余木生 1919 年創立「木生昆蟲採集所」，採集中發現許多新品種，日本學者所發表的「升天鳳蝶」、「國姓小紫蛺蝶」等都是他所採集；次子余清金繼承衣缽，1950 年拓展日、美外銷市場，鼎盛時期，有近 2,000 位捕蝶人協助採集標本，數百位女作業員進行加工。