Explain the source and meaning of these eight words word for word.

The meaning and origin of this idiom are related to the traditional numerology in China.

In numerology, a person's fate can be calculated by the date of birth. This idiom means that something has not been done, or a clear plan has not been made, just like the eight characters have not been left undone.

Specifically, the origin of eight characters is related to ancient writing habits. In ancient times, people used to write from top to bottom and from right to left, so when writing a character, the first stroke was the one in the upper right corner. If there is no clear plan or clue, then this eight-character has not been written completely, just a glimpse. People use eight characters to describe things that have no beginning or no clue.

The meaning of this idiom can also be understood as that things have not been completely determined, and there are still variables and uncertainties. At the same time, it also implies that things need further development and promotion in order to finally achieve their goals. This idiom is used to describe things that are not clearly planned or formulated, and there are uncertainties and variables. This idiom is widely used and can express the same meaning in different contexts. At the same time, this idiom also reflects the belief in numerology and the cautious attitude in China traditional culture.

These eight words didn't make a sentence:

1. He wants to study abroad, but he hasn't lost his mind yet, so he must work harder.

2. The plan of this project has not been specifically implemented, but the eight characters are not clear yet.

He wants to take part in this competition, but his preparation work is only eight words.

The plan of this company has not been decided yet.

He wants to invest in this project, but he hasn't lost his mind and needs further investigation.

6. The success of this project still needs a lot of efforts.

7. He wants to chase this girl, but his performance is only eight words.

8. The market prospect of this product is only eight words, which needs further study.

9. The goal of this team is unclear, but the eight characters are not clear yet.

10, he wants to achieve this goal, but his plan is only eight words and needs to be further improved.