The earliest letters appeared in ancient books and documents in China.

In ancient China, the earliest saying about credit investigation was that "a gentleman's word is a promise, but it is hard to recall", which originated from Zuo Zhuan.

Faithfulness and evidence, a China idiom, means reliability and evidence. Words with similar meanings are well-founded, evidenced and reasonable.

Zuozhuan is the abbreviation of Zuozhuan in the Spring and Autumn Period. In order to separate it from the Spring and Autumn Period, it is called abbreviation. Zuo Zhuan is not only a very famous historical book in the history of China, but also occupies a very important position in ancient literature. As China's first chronological work, its narrative is very detailed, recording the history of more than 250 years in the Spring and Autumn Period from the year of Luyin to the twenty-seventh year of Lu Aigong.

Make sentences with promises and signs:

1, ... Looking at the survival of Sui Room, it's really a word!

2, obsidian, faith, sign, the brilliance of the pearl, so now, the source of mass flow * * *, the real essence of the ancient method.

3, the matter of the third world, faith and levy, the home is returning to the heart, can not be taken lightly.

4, look at the survival of the sui room, think of words and have signs! Li Shangyin, a poet in the Tang Dynasty, lamented that his Ziquan Palace had been occupied by clouds, just as he wanted to take the whole Yangzhou for himself.

Criminals have to bow their heads and confess their guilt in the face of loyalty.

6, the gentleman's words, the letter and the levy, so the resentment is far more than his body.