What is the allusion of establishing a unified emperor?

Jiantong Di Feng: In the early years of the Western Zhou Dynasty, after Ji Fa's death, Song Ji, the eldest son, was young. With the help of Duke Ji Dan of Zhou, he became a monarch, namely Zhou Chengwang. One day, Wang Cheng and his younger brother Yu Ji were playing in the garden. He cut a tung leaf into a laurel shape.

Give it to my brother and say: Give you this jade laurel and make you the Hou of the Tang Dynasty! Historians nearby immediately asked the king to choose an auspicious day and named Yu Shu Hou. Wang Cheng disapprovingly explained: I was joking with him.

Historians seriously said: the son of heaven is joking. Zhou Gongdan also thinks that historians have a point. When he became king, he really made Yu Shu a vassal of the Tang Dynasty to manage the land and people there.

Extended data:

After Yu Shu came to power, he led the people to build water conservancy and develop agriculture, and the people lived and worked in peace and contentment, which was deeply loved by the people. In order to commemorate Yu Shu's achievements, later generations built an ancestral temple-Tang Shuyu Temple.

Because the ancestral temple is located at the source of Jinjiang, and Yu Shu is the founding emperor of Jin Dynasty, Tang Shuyu Temple is also called Jinci Temple.

The date when Jinci was founded is unknown. However, according to the relevant records in Zhu and Topographic Table of Shu Wei written by Li Daoyuan, a geographer of the Northern Wei Dynasty, Jinci Temple existed as early as the Northern Wei Dynasty.

In this way, the Jinci Temple has a history of at least 1500 years, and at that time it was already a fish and water swamp of the ancestral temple and a tourist attraction full of tourists.

References:

Baidu Encyclopedia-East Ye Feng Di