Murong Yan smiled and said, "Dad, Qingyun, how far can you estimate it is from here to the foot of the mountain?"

"It's more than one mile, close to two miles." Murong Qingyun was also very interested in this red cannon and answered immediately.

Murong Yan nodded, then asked, "So on the battlefield, what's the typical distance to start shooting arrows or throwing stones?"

"Although there's a saying about shooting an arrow through a target from a hundred paces away, soldiers on the battlefield are, after all, different from those masters. So, to conserve arrows, they usually shoot arrows at fifty paces and throw rocks at thirty."

"How far is that?" Murong Yan had no idea what Murong Qingyun said.

"Shoot an arrow about 12 feet."

Twelve zhang is about 30 meters. Murong smiled and said, "Then tell me, what would happen if I were to attack the area at the foot of the mountain from here?"

Murong Qingyu and Murong Qingyun were shocked after hearing this.

"Yan'er, do you think this thing can reach the foot of the mountain?"

Murong Yan didn't say anything, but opened the black box she had been holding. Three black objects suddenly appeared before her eyes.

"What is this?" Murong Qingyun asked curiously.

"This is the magic weapon that will allow you to defeat the enemy! Without this, the red cannon is just a pair of scrap metal."

Murong Qingyu: "..."

He had originally thought that with the blueprints for the Red Cannon and a grasp of how to use it, he would have the final say. It seemed Murong Yan was quite scheming, and had been keeping a trick up her sleeve for them.

Murong Yan didn't care what Murong Qingyu thought of her. As long as she could keep the method of making the bomb firmly in her own hands, Murong Qingyu would always be good to her.

After opening the tightly sealed red cannon and carefully inspecting it, Murong Yan was very satisfied with the craftsman who built the cannon.

"Dad, remember to reward the craftsman who made the red cannon when you get back."

Murong Qingyu's eyes lit up again: "Why, did Old Han and the others build it well?"

Murong Yan nodded and said, "It's very good that it can be made like this for the first time. Although there are still some minor flaws, I will communicate with him later. I believe that he will do better when it comes to mass production."

Murong Qingyu nodded: "Then... now can you let Daddy see the power of the heaven-defying weapon you mentioned?"

Murong Yan raised her lips proudly: "Of course. But Daddy has to light the fireworks first."

"good!"

The fireworks box was lit, and with loud bangs, beautiful fireworks shot straight into the sky, blooming into beautiful patterns in the sky.

Murong Yan put the bomb into the barrel, lit the fuse, asked Murong Qingyun to point to a place, and then bombarded that place.

There was a loud "bang" that shook Murong Qingyu and Murong Qingyun's hearts so much that they trembled violently.

This sound was completely different from the sound of fireworks. The deafening and heavy sound struck people's hearts directly.

Murong Qingyu and Murong Qingyun's faces turned slightly pale. They looked at each other and saw extreme shock in each other's eyes.

Although they had not yet seen the situation at the target location on the mountainside, the loud bang, the vibration of the cannon barrel, and the speed of the black shadow that was almost impossible to see with the naked eye or internal force were enough to shock them.

Almost at the same time, the two of them couldn't help but use their Qing Kung Fu to fly towards the target on the mountainside.