Mazhao Town belongs to Zhouzhi County, Xi'an City, Shaanxi Province, and is located 10 kilometers south of Zhouzhi County. Close to the Qinling Mountains in the south, it is one of the four major kiwi fruit industrial bases in Zhouzhi County. "The water in the Black Pool is as dark as ink, and it is said that there is a dragon that no one knows about." This is a poem by Bai Juyi, who was the magistrate of Zhouzhi County. Bai Juyi's "Song of Everlasting Sorrow" is said to have been written in Xianyou Temple on the banks of the Heishui River. This Xianyou Temple was the palace of the emperor of the Tang Dynasty. It was surrounded by the Black River, forming a crescent shape. The temple was built on the mountain with a towering brick tower. Standing in the courtyard of the temple, everything is silent except for the rushing river. It is a good place to cool down and escape the heat. Whenever we come here, we look for the footprints of the poet Bai Juyi and recite poems that have been sung through the ages. It covers an area of ??78 square kilometers and has a population of 36,000.