The Nation's Shield

A modern medical doctor transmigrates back to the Republican era.

With the help of a futuristic intelligent assistant, he gradually grows into a super spy.

Other intelligence agents risk death to steal information. He only needs to stroll around outside the archives.

Others carefully plan to kill traitors. He just needs to take them out with a shot from hundreds of meters away, then leave calmly.

Others torture Japanese spies for information. He only has to play a little question-and-answer game to get vital intelligence.

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