Su Yun was in a special state. During the absorption of the supernatural aura, he seemed to have experienced everything Lao Tzu had seen on his way west. He seemed to have become one with Lao Tzu. Lao Tzu's comprehension also left some signs in his heart.
Now that the supernatural aura had been completely absorbed by Su Yun, when he opened his eyes again, he could see the ancient aura at a glance. Therefore, it was a dream. Although he woke up from the dream, he did not come up empty-handed.
Lao Tzu had traveled all the way west to Yinfan to transform the barbarians and bring wisdom to this land. That was how such a large country with such a flourishing religion in the future came about.