Zhao He roughly explained the principle of the compass to the two of them, and the more Ying Zheng and Li Si listened, the hotter their hearts became.

What a pure good thing!

Much more powerful than that Sinan, according to Zhao He, this thing can be carried around, and it is light and compact, and most importantly...

"Da Qin: I'm planning a rebellion, my father is actually the first emperor" Chapter 235 Sanguang is in the middle of a hand, please wait a moment,

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