Indeed, no one knew that Wang Bo'an was actually not in Tiandu, but had already left Tiandu and returned to the border to prevent the Demon Race from invading.
Having defended the border for over a hundred years, commanding the army in constant friction and conflict with the Demon Race, Wang Bo'an had a deep understanding of the Demon Race and knew well the balance between the human race and the Demon Race.
When he saw those Spirit Realm Cave Heavens, he understood that if this news got out, it would inevitably provoke the Demon Race, causing a huge reaction from them.
As one of the few supreme strong members of the Great Ming Divine Dynasty, he learned of Pei Xuanjing's plan and understood the existence of the Godsealing Plan; he knew that there must be a great war between the human race and the Demon Race.