As Song meant,

Being a Song means: and he himself is laughed at by the Song people.

"The rabbit can't be found back, but as a Song Dynasty man" means that the rabbit won't get it again, but he has become the object of jokes of Song Dynasty men.

From Everything is Wrong (dù), the original text is about a farmer in Song State. When he saw a rabbit bitten to death on a tree root, he put down his hoe and waited by the tree root, hoping to get the bitten rabbit again, but he never got it again. This story tells us: don't take chances, don't think about getting something for nothing, if you don't work hard, the result can only be nothing.

The original sentence is "the rabbit can't chase it back, but he is Song Xiaoguo", which means that the rabbit can't chase it back, and he himself was laughed at by the Song people. Source: Han Han Fei, by Han Fei Woods in the Warring States Period.

Original: Song people have cultivators. There was a plant in the field. When the rabbit touched the plant, its neck broke and it died. Stand by and watch because you released this plant, hoping to get the rabbit back. Rabbits can't be recovered, but as a small fruit of a song. Today, the people who want to go to the former dynasty are all guarding their factories and so on.

There was a farmer in Song State. There is a stump in the farmer's field. One day, while he was in the field, a hare ran quickly and crashed into a stump and died. After the farmer got the rabbit, he put down his farm work and stood in front of the stump. He is looking forward to getting another rabbit like last time.

As a result, the rabbit didn't get it again, but he took it as a joke of the Song people. And now I want to use the past methods to govern the present people, just like waiting for him.