Master the correct method, attach importance to facts, common sense and logic, and know that the strong in history are often smart and pay attention to contact.
Read history books, but don't be superstitious, learn methods, keep yourself, and keep your main views and positions for a long time.
We should guard against quick success and utilitarianism, guard against withdrawing theories, resist inflammatory theories, and do not read or seriously read books that confuse concepts, have a strong tone, and pretend to be superior (such as Lu Xun's brushwork), or read theories and carriers that belittle ourselves or most people.