"No investigation, no right to speak" is a famous assertion put forward by Mao Zedong in his masterpiece against bookishness. This assertion later became the slogan of China producers to proceed from reality, go deep into the masses and integrate theory with practice. Looking back on the development of our party, we can clearly see that the whole party attaches importance to, persists in and strengthens investigation and research, and the party's work decisions and policies are in line with objective reality, and the party's cause will develop smoothly; Ignoring investigation and study or insufficient investigation and study often leads to subjective understanding divorced from objective reality, and the will of leadership divorced from the will of the masses, which leads to decision-making mistakes and losses to the cause of the party.