Oriental Tea Complex (OTC) is a plant complex containing extracts from 6 types of tea which are popular in Asia: persimmon leaf, cinnamon bark, Japanese mugwort leaf, Chrysanthemum indicum flowers, Chinese quince fruit and green tea leaf. It is processed by low temperature ultrasonic extraction method to prevent the destruction of unstable active compounds.

东方茶园（OTC）是一种植物复合物，含有亚洲流行的6种茶的提取物：柿叶，肉桂皮，日本艾叶，菊花，qu fruit和绿茶叶。采用低温超声波提取法处理，防止不稳定活性化合物的破坏。