The quality and taste of tea is determined by the soil and climate. From the beginning, Taiwan’s unique natural environment has enabled it to produce oolong tea of the highest quality. In terms of soil, most of the soil composition in the alpine region of Taiwan’s central mountains range (1000m and above) is sandy clay suitable for the growth of well-irrigated top grade tea plants growing in hilly regions. In terms of weather, the marked temperature difference between day and night time in the mountains, as well as the fog at night and dawn, improve the quality of the tea plants.

Due to the different altitude and soil of each region, each kind of high-mountain tea is marked by a unique taste and fragrance. The most popular tea plantation regions in Taiwan are currently Lee-San, Ali Shan, Dong-Ding Shan, and Da-Yu-Ling Shan.