It's quite normal for the people of the Heavenly Court to know him, since he is going to the Outer Heaven Battlefield, the Heavenly Court will definitely have appropriate arrangements.
"Please follow me, Taoist Monarch Changsheng."
This True Immortal led Lu Changsheng to a Cave Mansion.
"Taoist Monarch Changsheng, inside the Cave Mansion is an introduction to the common knowledge about the Outer Heaven Battlefield."
"You can decide after reading it."
"If there is anything you don't understand, you can ask me anytime. I am Xuan Jiu, the True Immortal specifically responsible for receiving Taoist Monarch Changsheng."
Lu Changsheng nodded.
The Cave Mansion wasn't luxurious, but it was clean and tidy.
Lu Changsheng saw blocks of Jade Scrolls inside the Cave Mansion.
They should contain information about the Outer Heaven Battlefield.
Thus, Lu Changsheng used his consciousness to inspect them.
The Jade Scrolls introduced some basic aspects of the Outer Heaven Battlefield.
