Although not entirely confident, Han Li preferred to bide his time, allowing his enemies the freedom to roam until his strength was sufficient to dispatch them for good.
The Xuxian Realm has its own set of rules, forbidding Immortals from entering, lest they be eliminated by the realm's regulations. However, if one's power is great enough, for instance, that of an Immortal King, even the Xuxian Realm can do nothing about it—though an Immortal King would not concern themselves with the Xuxian Realm.
The summit of the Heaven Imperial Realm is the highest cultivation level allowed by the Xuxian Realm. Thus, Great Emperors with combat abilities comparable to those of a Heavenly Immortal are highly influential within the Xuxian Realm, practically moving unimpeded.