Does Yan Mingguang know Wei Yan?

I recognized him through the document. I should have recognized him from the beginning. In the previous chapters, I said that Gu noticed him as soon as we met and agreed to accept Yan after reading his fake file. In chapter 14, I recognized him clearly. When Gu signed it, he almost wrote down Yan's real name. It is known that he lost his horse in chapter 47 of a first-class lawyer's novel.