Li Shimin said again, and Cheng Yaojin pricked up his ears and listened.

"Father, wait a minute, let me think about what to say."

Yes, Li Yun is not Li Min, so he can say a lot of things casually.

He had to organize his language.

"It's okay, just think about it slowly, I have plenty of time."

Li Shimin said this.

After a while, Li Yun said: "Shengtang Group has begun to study various types of drones, which have different power systems. They have four propellers and are very similar to current aircraft.

There are also different sizes, each one has its own use, and they have many functions!"

"What's the purpose? I'm listening." Li Shimin showed great curiosity.

"Yes! What is the role of the Seventh Prince?" Cheng Yaojin asked.

"Father, please wait a moment. I, my son, have to organize some conversation and wait a moment."

Li Yun said that he was not prepared when he came.

How did he know that Li Shimin wanted to know about drones?

If he had known it in advance, he wouldn't have been so hasty.
Chapter completed!