Hong Jun appeared in the novel "Romance of Gods" as a grand old gentleman, a deity from the beginning of the Yuan Dynasty, and a teacher of Tian Tong. In the novel, Taoist Hong Jun is the ancestor of all immortals, and there is a saying that "Hong Jun came first, then Heaven came". According to this statement, status has gone to heaven. For details, see Chapter 84 of Romance of the Gods. Ziya soldiers take Lintong Pass.
Speaking of the Romance of Gods (written in Wanli), it was written by Chen. It's just a folk ghost novel, which can't get into orthodoxy. Many people think that Romance of the Gods originated from Taoist classics, which is wrong. To put it bluntly, Romance of the Gods, like The Journey to the West, is a folk story decorated by literati. The difference between the two is that the story of cutting Zhou is more influential than Buddhist scriptures, but Wu Cheng'en is more talented than chen more, so the Romance of the Gods did not enter Four Great Classical Novels, but The Journey to the West did.
To sum up, Jun Hong is a novel image created by Chen himself (before that, there was no folk myth).