The original translation and annotation of the fourth chapter of Laozi are as follows:

Original text: When the Tao is in conflict, it may not be profitable. Yuanxi is like the origin of all things. Zhanxi seems to exist. I don’t know whose son is the first of Emperor Xiang.

Translation: Tao is empty but there is no end to the use of it. So profound, like the source of all things. Indifference may still exist. I don't know who created it, it seems to be the ancestor of the ancient emperor.

Note: This chapter describes the characteristics of Tao and its relationship with all things. The following is a brief explanation of each sentence:

Use it when the road is in conflict or it will not make a profit.

"Tao" is the core concept in the Tao Te Ching, referring to the origin and natural laws of all things.

"Chong" means void and emptiness, which here implies the nothingness, profoundness and infinity of Tao.

"Use it and it may not be enough" means that although the Tao is used, it is never exhausted. This emphasizes the inexhaustibility and inclusiveness of the Tao.

Yuanxi is like the origin of all things.

"Abyss" refers to abyss and profoundness, expressing the profundity and vastness of Tao.

"Like the origin of all things" means that Tao is like the source of all things and contains the origin of all things.

Zhanxi seems to exist.

"Zhan" means deep and clear, indicating the purity and indifference of Tao.

"Like or exist" implies the existence of Tao, perhaps meaning that although Tao is far-reaching and void, it still exists.

I don’t know whose son is the first of Emperor Xiang.

"I don't know whose son" means that the author does not know who created Tao, emphasizing the mystery and transcendence of Tao.

"Before the Elephant Emperor" links Tao with ancient emperors, implying the antiquity and nobility of Tao.

This chapter emphasizes the infinite, profound and inclusive nature of Tao, as well as the connection between Tao and all things. It reminds people that although the nature of Tao is difficult to understand, under its guidance, wisdom and enlightenment can be obtained. These concepts are reflected throughout the Tao Te Ching and are of great significance to understanding Laozi's philosophical thoughts.