It means: don't treat gold and jade as treasures, but loyalty and credit are the treasures from The Book of Rites.

Not enough for a walker, as I said; Not enough to believe, be honest.

it means: people who are not honest in their behavior must talk big; People who are dishonest and trustworthy often pretend to be sincere. From

A Brief Introduction to Xunzi, if you are sincere, you will know the way of heaven. If you think sincerely, you will learn from others.

it means: honesty is the law of nature, and the pursuit of honesty is the law of being a man. From Mencius. Li Lou on ".

whenever you speak, you should believe first, cheat and be false, and you can't be ridiculous.

It means: Honesty comes first in words and deeds; Deception and nonsense, how can that be? From Disciples' Rules.

people who don't understand and hear a lot can't have friends who understand and hear a lot.

It means that people who are not honest, faithful and knowledgeable can't get honest, faithful and knowledgeable friends. From (Qing) Shen Juyong's "Western Rock Redundancy".

Haiyue can still lean, but his word will not change.

it means: the sea can dry up, the mountains can collapse, and the promises made can never be changed. From (Tang) Li Bai's poem Chronicle of Tang Poetry Volume 18.