240, Form of firearms that appeared centuries earlier

Before long, a group of people entered the Heavenly Master Mansion and followed a side path to arrive at Gongshu Tianyuan's residence.

That day, Zhao Douan gave a lecture there.

However, this time, they did not meet in that cluttered room, but in a relatively clean small hall.

"Lord," he said, "since our last parting, I have repeatedly pondered over your lecture from that day. The more I think about it, the deeper and more profound it seems..."

Gongshu Tianyuan adopted an eager-to-learn stance.

Zhao Douan cleared his throat and smiled,

"Brother Gongshu, we can discuss these matters some other time."

"Oh! Yes, yes, let's talk about formal matters first," Gongshu Tianyuan said awkwardly, scratching his head:

"You said you had something to discuss with me?"

Zhao Douan hummed in affirmation, and in a calm and unhurried manner, briefly described the situation.

"Firearms?" the short and plump priest blinked in confusion, then suddenly realized: