Su Yang was also shocked as he looked at Ye Sword Saint, he hadn't expected Ye Sword Saint's progress to be this swift.
When he had just entered the Heavenly Realm, he certainly hadn't reached the Sub-Saint realm. In fact, it could be said that at that time, he was still far from the Sub-Saint realm.
Because at that time, when he went to annihilate those four Major Sect, he was still stopped by the Lord of the North. Although he forcefully defeated the Lord of the North and his people, and drove those four Major Sect's people into hiding, he couldn't destroy those four Major Sect despite fighting for such a long time, which showed his strength clearly.
Su Yang used his own power to gauge Ye Sword Saint's strength. He estimates that his current strength could achieve the level Ye Sword Saint had back then. This means that before entering the Heavenly Realm, Ye Sword Saint's strength was comparable to Su Yang's current level.
