Lujiang out of the three Tianzidu, into the river, Peng Zexi ([Commentary] (1) Lujiang: "Lujiang" first appeared in the "Shan Hai Jing • Hai Nei Dong Jing" a river name, now which water flow is still uncertain. Hou County because of the name of the river, the name of the county because of the name of the county, continues to this day. Lujiang, also known as Qianchuan (潜川), began in the Southern Dynasty Liang (Book of Liang, Book of Wei, Topographical Chronicle). One refers to the Luyuan Water of Jiangxi, which originated from the Luling Mountains in the northwest of present-day Wu [wù] Yuan County, Jiangxi; the first is the Qingyi River, which is in the southeast of present-day Anhui, and the upper source is the Qingxi River. (2) Three Heavenly Sons: The name of the mountain, that is, the Three Heavenly Sons. "Shan Hai Jing * Hai Nei Nan Jing": "The Three Heavenly Sons [zhāng] Mountain is in the north of the Fujian West Sea. Guo Puyun: "Now in Xin'an She [shè] County, now the so-called Three Kings Mountain, Zhejiang is also out of its border." Zhang's land records: There is Shicheng Mountain in the south of Yongkang County, Dongyang, and there is a small Rock City on it, and Emperor Yunhuang once visited here, that is, the three Tianzidu." Hao Yixingyun: "The Sea Inner East Jingyun: 'The three heavenly sons are in the northwest.'" There is no sea word, this is doubted by the sea word." Ke Case: Hai Nei Dong Jingyun: "Zhejiang out of the three Tianzi capital, in the east of The Yin (the original character is its, according to Wang Niansun and Hao Yixing) east, in the northwest of the country, into the sea, the rest of The South." Youyun: "The Three Heavenly Sons of the Wanjiang River entered PengXi." A day of heaven and earth." Hai Nei Jingyun: "Inside the South China Sea, there is the capital of the three heavenly sons of the mountain name." That's it. Its land was roughly in the territory of present-day Anhui Province. (3) Peng Ze: Guo Puyun: "Peng Ze is now Peng Li [lǐ] also, in Xunyang PengZe County. [Translation] The Lujiang River originates from the Three Heavenly Sons Mountain, and flows into the Yangtze River to the west of Pengze). Yi Yue Tianzi 鄣 ([Commentary] [Translation], (Three Heavenly Sons Dushan) is called Tianzi 鄣).