"Huh?" Xu Xin exclaimed softly.

Can't the heavy crossbow only be mounted on the wall of a tree house?

"Brother Xin!" Ma Hongwei swung down from the tree house.

"That heavy crossbow is..." Xu Xin pointed to the heavy crossbow under his tree house.

"Oh, that's one of the things I wanted to tell you about." Ma Hongwei said, "It's a device that, when placed on the floor of the tree house, allows the heavy crossbow to be hung below the tree house and attack the area below."

Xu Xin's eyes lit up: "Not bad!"

This is a great invention!

The area below the tree house has always been a blind spot for heavy crossbows.

He can rely on the plant heart to protect the area below the tree house. If others are hurt below, they can only rely on the roots of the tree house, or hang themselves and attack with a crossbow, or go down directly.

His banyan tree further exacerbates this shortcoming.

After all, the banyan tree expanded the area of ​​the tree house, and also expanded the blind spot of the heavy crossbow.

However, with this device, you don’t have to be afraid!

The heavy crossbow can also attack the bottom of the tree house!

"However, the heavy crossbow cannot be manually controlled from the floor," Ma Hongwei said. "It can only be controlled through the control panel. Therefore, if we want to mass-produce and distribute this device, it must be included with the control panel."

Xu Xin nodded.

That's not bad.

Now that they have Qin Fu, they will no longer be short of the blue-grade wood needed for the control panel.

"Brother Xin, let's go upstairs. I want to show you something." Ma Hongwei suddenly said mysteriously.

He controlled the roots of the tree house and brought Xu Xin into his laboratory on the third floor.

There were still wood chips and debris all over the ground, and this time, there was even a lot of metal scraps.

Ma Hongwei walked to the workbench, grabbed a two-meter-long heavy crossbow with a metal head and handed it to him.

"Brother Xin, take a look at this."

Xu Xin took it.

So heavy!

At the same time, the introduction appears.

[Delayed Explosive Metal Heavy Crossbow (Blue): A heavy crossbow with exceptionally strong penetrating power. The head of the crossbow is not only extremely sharp, but also contains explosives. The explosives will explode one second after the crossbow is inserted into an enemy unit, causing explosive damage!]

Xu Xin's eyes widened immediately.

This is a heavy crossbow used to fight against giant beasts!

Ma Hongwei actually made this thing!