This kind of thing, Guo Deren, how could Guo Yi not join in the fun, and hurriedly asked Sun Ming.

The latter also readily agreed.

Anyway, I took them to see it, but I didn't know why, and there wasn't so much information to check in this era.

Even if you have some clues, it is too difficult to go deeper, unlike later generations, where there are so many theoretical foundations to consult, such as the fundamentals of mechanics.

......

Chapter 127 of "Saving the Ming Empire from the Son-in-law" Let it go and take a look It's in the middle of the hand, please wait a while,

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