1. Since ancient times, the teachings of sages and sages have put practice first, followed by knowledge and speech. ——Lin Xiyuan (Ming Dynasty)

2. There are also disadvantages to studying exclusively, so you must get in touch with the real society to make the books you read come alive. ——Lu Xun (middle)

3. What you learn on paper will eventually make you realize it, but you will definitely know that this matter must be carried out. ——Lu You (Song Dynasty)

4. Only practice can overcome the mistakes of experience. ——Ba people (.