White Tea known as Bái Chá tea is also a classic for tea farmers and drinkers the world over. White tea is the only category of tea that is, by definition, raw. It begins unoxidized and slowly oxidizes over time. There is a sweet, refreshing feeling imparted by white tea that has made it such a favorite. Lao Bai Cha (Old Aged White Tea) continues to oxidize during storage, the longer they are stored, the richer and mellower they will become.