Why can't the dog queen Yun Hao, who was defeated six years ago, come back?

He was on the battlefield, but the only thing Shan didn't know was that he didn't come on the wedding day. She thought he regretted it, because he was a famous photographer, so she gave him the ring. As a result, on the one hand, his female assistant seems to like him, on the other hand, she doesn't want his talent to be buried, so she shows the ring to the man and tells him that Shan is the only one who doesn't want to marry him.