In 1952, Taipower built Wanshantag next to the old Qilai Tai-power hut. Originally it was called "Qilai Temple" and was to remember those who died in the line of duty in the construction of the "East-West Power Transmission Line" since 1950. In the autumn of 1953, it was opened for worship. In 1980, a road was opened for the construction of the Papaya Creek Hydropower Project. Nenggao Traversing Trail and the original Qilai Tai-power hut were abandoned. Therefore, with donations from the engineers, the temple was relocated to the current site next to the Qilai Lodge. In the past, on the autumn equinox of September 23 every year, Wanshantang would hold sacrificial activities, and the line guards and supervisors who were related to this route would attend the event in person. In recent years, the road is no longer passable, so the Huadong Power Supply District Operation Office hold the autumn equinox festival at the office.
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