The daily tolls alone were enough to cover the daily expenses of the Qianhu Office, without him having to use up the balance in the shopping mall.

Pei Yun originally thought that after completing the task of pacifying the barbarians, the emperor would summon him. After all, he had solved the court's worries, and he should be rewarded for such a great contribution.

In the end, nothing happened. The emperor did not summon him, and he did not receive the reward he deserved.

After learning more about it, he found out that the imperial court was at war with the Northern Hu and probably had no time to care about him. Pei Yun was also happy to have some free time, so he decided to just develop peacefully in the Qianhu Suo.

In addition to daily practice, Pei Yun focused on the research and development of firearms.

Now that he had the clay pot bomb, Pei Yun wanted to get out the gun.

The smelting technology of this era was not capable of producing gun barrels. Pei Yun thought about it and decided to buy high-carbon steel pipes online to use as gun barrels.

However, Pei Yun was not very familiar with firearms and could only search for a lot of information on the Internet. But even so, it was difficult to make a gun.

Moreover, the steel pipe needs to be sawed to the appropriate length, and the saw cut needs to be polished smooth. The inside of the barrel also needs to be smooth, and it needs to be rubbed a little bit with fine sandpaper.

Just polishing the barrel smooth is very time-consuming.

Pei Yun spent three full days to make a fairly qualified gun barrel. Next came the ignition device. Pei Yun followed the methods found on the Internet and directly used the ignition device of a lighter, which of course required some modifications.

After the ignition device was made, Pei Yun felt that he could give him a handicraft master award.

Seven days later, Pei Yun finally made a relatively simple flintlock rifle.

"Master, what are you doing? It feels weird."

Leng Qingqiu saw Pei Yun holding a flintlock rifle and spoke with some curiosity.

Pei Yun smiled and said, "This is a good thing. With this thing, cold weapons can be eliminated. Come with me, I will show you the power of this gun."

Leng Qingqiu followed Pei Yun to the shooting range where archers were training.

Wang Xuan and others were also here. When they saw Pei Yun coming, they all surrounded him.

They all knew that Pei Yun had been making new weapons these days, and now that he was here, it seemed that he had succeeded.

"Boss, is this the gun you mentioned that is more powerful than a bow and arrow?"

Wang Xuan looked at the gun in Pei Yun's hand with a look of suspicion.

Pei Yun smiled and said, "You will know later."