Leaving aside the instant when the Fortune manifested among Cao Cao and others, causing the dragon form of Han Chang'an to weaken somewhat, let's just say that Cao Cao's Coiling Dragon form has pushed Liu Xie's apprehension to a very high level.
Unlike Liu Bei, when Liu Xie sees Liu Bei manifesting the True Dragon form, at most he feels helpless jealousy. The plight of the emperor in the Eastern Han is such that emperorship rotates, arriving at one's family each year. Emperors in recent generations are selected from the Imperial Clan.
This has led to the situation where the Han Imperial Kinsmen at the end of the Eastern Han are all essentially candidate emperors. Now Liu Bei is the candidate most likely to ascend, so when the Golden Dragon manifests, it's ultimately contained within the pot of his own Liu Family, unrelated to other families.
