Chun Fun How is the first tea shop in Taiwan to use sweet potatoes in their teas. Four types of tea bases are carefully selected: Siji Chunqing tea, Taiwanese roasted oolong, black tea and green tea. Fan favourites include fragrant Yuzu green aloe honey, sweet potato pearl fresh milk tea, sugarcane green tea, purple sweet potato pearl fresh milk green tea, and winter melon oolong, among many other signature Taiwanese flavours.