The HK$20 notes will be themed around yum cha, or tea gatherings, while the HK$50 notes will feature butterflies. Of the 2.36 billion banknotes in circulation in Hong Kong worth a combined HK$503. ...

Yum Cha is a dim sum restaurant in Hong Kong that makes traditional custard buns with a visceral twist. The buns come with "eyes" and are meant to be poked open and squeezed before eating.