Learn from foreigners to control foreigners. This sentence comes from Wei Yuan in the Qing Dynasty. "Foreigners" is a disparaging term for enemies and foreigners.

This thought advocates arming ourselves with foreign advanced science and technology to resist foreign aggression and make the country embark on the road of prosperity.

Wei Yuan's "It" was the most detailed monograph introducing western history and geography at that time, which played a positive role in broadening people's horizons and guiding people to pay attention to the world form. Explanation: In ancient times, ethnic minorities were often called barbarians, which was a contemptuous name. The word "barbarian" in this sentence refers to foreigners.

Teacher: Learning from ... means learning from ...; Long skill: the skill you are good at, that is, strength.

Learn the strengths of foreigners (mainly shipbuilding skills) to beat them.

Personally, it feels a bit like: give him whatever he wants, and give him whatever he wants.