Of course, Huang Chengyan and the three didn't know.

Regarding the mathematical content in the genealogy, except for the first time Wang Can helped Huang Yueying modify it slightly, the next few additions were all added by Huang Yueying herself.

She hopes to teach children the simple application of the lever principle, which is the rod scale invented in ancient China.

This name appeared as early as the Qin and Han dynasties, and it is also widely used in the lives of ordinary people.

"Wufu Zhuge Kongming" 207.Zhuge Jun: I'd better shake my hands (ask for a monthly pass) is in the middle of the hand, please wait a while,

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