What is the stem of walnut in Song Dynasty?

Song Juhan's novel "Drunk for Many Years".

When Song Juhan tried to please him in every way, he took a drunk friend back to the hotel, was photographed and sent to the group where Song Juhan was located, where all kinds of big cows gathered. Song Juhan rushed into the hotel and asked the king why:

"Do you know what I was doing when Otellini sent your photo to more than 200 people?"

He smiled and his eyes were red. "I'm knocking walnuts for you."

The tension of the scene description is tense, but it seems a bit funny because of knocking on walnuts.

After this scene was restored by a studio, it was widely spread on the Internet because of the tension described in the scene and the funny action of knocking walnuts, which attracted a lot of attention and formed the stalk of Song Juhan knocking walnuts. Many people remember knocking on walnuts because of the simple and magical love of actors, so knocking on walnuts once became synonymous with some people.