Yinreng was well aware of the greed of those people.

Introducing foreign businessmen is also a means of suppressing Shanxi merchants.

After Yinzhen enters the court, let him build up the royal industry and be deeply bound to Yinsi. With the support of the tenth prince Yinsi, the position of the eighth prince will surely be stable, which is reassuring.

As for now...

"Seventh Brother, when apples are ripe, why do they fall to the ground instead of flying up into the sky?"

Yinyou: “…”

He suspected that there might be something wrong with his second brother's brain.

Isn't it common sense that an apple falls to the ground? Why did he ask such a simple question?

“There’s no reason, it just falls to the ground.”

Yinreng: “…”

Seeing the worry in Yinyou's eyes, Yinreng really wanted to jump up and beat this kid up.

"Have you ever thought that it's because of the earth that it has an attraction on all objects, forcing them to cling to the ground?"

Yinyou frowned, thinking about something.

Yinreng did not disturb him and let him think on his own.

After a long time, Yinyou spoke,

"The smoke and water vapor from burning fire float upwards."

If all objects depend on the earth for their existence, then why does water vapor float upwards?

Yinreng's eyes lit up.

This guy has something.

"Is it possible that the air we live in also has weight? It's just that its weight is insignificant to us, but it is very obvious to water vapor and smoke."

Yinyou fell into deep thought again.

Can this still explain the rise of water vapor?

But after thinking about it, Yinyou found another loophole and reminded him,

"Water vapor rises, so it doesn't count as being attached to the earth, brother."