The character Tse Sai Pei has been active in the Hong Kong illustration scene since 2012. Over the years, she has collaborated with numerous brands both online and offline, including The Glenlivet, Uber, Martell, and 7-Eleven. She has published over ten illustrated books and hosted several solo exhibitions. In the summer of 2025, she opened a physical boutique called "Tse Sai Pei Department Store" in Ma Wan, Hong Kong, where she sells her own uniquely designed creative products and merchandise.