Taiwan's universities currently have just three specialists in blowing glass instruments. Besides Hsu Yu-ch'uan, the other two are at National Tsing Hua University and at NTU's department of chemistry, and both are Hsu's apprentices.
目前國內大學中只有三位吹製玻璃儀器的專門人員，除了許玉釧在台大物理系外；另兩位分別在清華大學及台大化學系，他倆都是許玉釧的弟子。