Wuhan, Hubei - It was raining cats and dogs, and the accumulated water covered my feet. I rolled up my pants and held an umbrella to inquire with the staff of Xingang about the logistics situation; The Qinghai Tibet Plateau - crossing canyons, tunnels, and bridges, boarding trains to observe the construction of the Lalin Railway on site, and taking a closer look at the construction of the vast western border railway network; In Zhengding, it was proposed that "more than one-third of the time should be spent every year at the grassroots level to study new situations and solve new problems"; In Fujian, we vigorously advocate "receiving letters and visits at the grassroots level, conducting on-site office work at the grassroots level, conducting investigations and research at the grassroots level, and promoting the Party's policies at the grassroots level"; In Zhejiang, it is stipulated that "members of the provincial and city/county leadership teams should have 2 and 3 months each year to conduct grassroots research, and the main leading cadres should do it themselves and write 1 to 2 investigation and research reports with information, analysis, and insights each year"; After the 18th National Congress of the Communist Party of China, the Party Central Committee issued eight regulations, the first of which was "to improve investigation and research"; In the report of the 20th National Congress of the Communist Party of China, it was solemnly proposed to "promote the glorious tradition and excellent work style of the Party, promote party members and cadres, especially leading cadres, to take the lead in conducting in-depth investigations and research, and devote themselves to practical work, seeking practical recruitment, and seeking practical results". Our party's heirloom - "Investigation and research are the foundation of planning and the way to success. Without investigation, there is no right to speak, and without investigation, there is no decision-making power." The rugged mountain road bears witness to Chizi's heart. One hot and one cold, reflecting the Communist Party's pursuit of truth, pragmatism, and loyalty; As time goes by, the fundamental question of "what is the CPC and what to do" is being refined.