The world is material, and material determines consciousness; Material is in motion, and material movement is regular, which requires us to proceed from reality, seek truth from facts and be pragmatic. The world is always developing, and the practice as the basis of cognition is also constantly changing and developing, so is human cognition, and the pursuit of truth is endless. We are required to emancipate our minds, keep pace with the times, blaze new trails, test and develop truth in practice, and be pragmatic.