In March, Taiwan’s Chunghwa Post (Zhōnghuá Yóuzhèng / 中華郵政) issued new postage stamps commemorating Zhuyin Fuhao (註音符號) (aka bopomofo, bopo mofo, or bpmf). The postal service has released another three sheets of these stamps, finishing the series.

sources:

• 特733 注音符號郵票(第1輯)
• 特743 注音符號郵票(第2輯)
• 特746 注音符號郵票(第3輯)
• 特747 注音符號郵票(第4輯)