The central mountain range known as the "Taiwan roof" is located near Suao in the north, and the goose nose at the southern end of Taiwan in the south reaches the north-south center of Taiwan's main island. The island is divided into two parts: the east and the west. Become the backbone and watershed of the island. The Central Mountain Range is 270 kilometers long and 80 kilometers wide from east to west. The well-known Hehuan Mountain is among them. 3703 meters above sea level, all composed of shale that disintegrates and shatters, surrounded by depression, overlying hard conglomerate, sharp-edged apex, triangular pyramidal peak, like a pyramid standing on the central mountain range. The mountain is steep and straight, and it is called the first tip of the island.