Why do some people say that the biggest vassal state in the Spring and Autumn Period became a "joke"?

Song Dynasty became a joke in the Spring and Autumn Period, in fact, the main reasons were their stupidity and the supervision of the Zhou royal family.

First of all, let's look at the origin of Song State. Song State is a vassal state of Zhou Dynasty, and its founding monarch, Wei Ziqi, is the eldest brother of Zhou Wang's mother. However, due to various reasons, he didn't become a monarch in the end, so he was always at odds with Zhou Wang and even perished the Shang Dynasty in the Zhou Dynasty. Wei Ziqi's monarch was also credited, so Wei Ziqi was enfeoffed to Song after the establishment of the Zhou Dynasty, but one thing happened during this period, which made Song become one of the most powerful governors, that is, Wu Geng. This incident was caused by Zhou Wang's eldest son, Wu Geng, who jointly monitored the rebellion of his three princes, but it was finally suppressed by Duke Guo and Duke Zhou, and most of the adherents of Shang Dynasty at that time belonged to Song State. It even gave Song the right to worship the emperor without paying tribute to the Zhou Dynasty. In this way, the state of Song is quite detached.

However, after the Song Dynasty gained a large number of adherents of Shang Dynasty and detached status, the surveillance of Wu Geng by Zhou Dynasty was also inherited by Song Dynasty. You know, in the real history, he can actually be a wise king for the Shang adherents, so the Shang adherents miss him very much. Therefore, some Shang adherents hate Song's betrayal of the former king's career, and many of them have fled to all corners of the country. Moreover, many elite soldiers at that time also ran almost, so the military strength of the Song State was almost zero, and the etiquette at that time was the only thing that could maintain the existence of the Song State, so they respected and obeyed the etiquette, so that the Song State in the Spring and Autumn Period was still holding on to it carefully.

The event that really made Song a joke was when Chu attacked Song and "xianggong" fought with courtesy and benevolence. He also watched the Chu army crossing the river, so the song was destroyed by Chu, and then Chu laughed at the pedantry of Song, so the dream of maintaining etiquette in Song was laughed at for nearly a thousand years.