From Historical Records Yao Dian, Yao ordered He's four sons (Xi Zhong, Shu, Shu Heshun) to go to the east, west, north and south, so that all seasons are respectful to heaven and people.
Extended data:
(1) bearing: direction position. East, south, west and north are the basic directions; Northeast, southeast, etc. It's the middle direction. In birthdates, the diagonal distance between two planets is called azimuth. Eight house geomantic omen determines the sitting direction of the house according to the orientation of the gate.
(2) Yingyi refers to the eastern coastal areas of ancient Shandong.
(3) South crossing refers to toe crossing. The name of ancient region refers to the south of Wuling. Because it is located in the south, it is called.
(4) Empty Valley is a Chinese character, which is the incarnation of pinyin mèi gǔ incarnation. It was defined as the place where the west entered China in ancient legends.
⑤ Shuo Fang, meaning north, English North. Shuofeng refers to the cold in the north, which is very cold. It can also be called Shuofang.
References:
Baidu encyclopedia-the book of history
Baidu Encyclopedia-Yiyi
Baidu Encyclopedia-South Communication
Baidu encyclopedia-ignorance valley
Baidu encyclopedia-shuofang