The theoretical concerns, historical implications and practical characteristics of the "Three Musts" are in line with the "Two Musts" and keep pace with the times. It is a naturally generated "organism" based on theoretical thinking, historical evolution and practical scientific logic of the times. The concept of "Three Musts" takes the grand goal of building a strong country and national rejuvenation as the fundamental value direction, and it gradually answers the major questions of how to keep the right direction, how to embark on the great journey, how to maintain a high spirit, and how to achieve the grand goal from the dimensions of subject, direction, and situation. Therefore, the "Three Musts" is a political reference for all Party members and cadres to strengthen party spirit cultivation in the new era; it is also the spiritual driving force of the Party’s self-revolution to promote the great social revolution; besides, it is the action program for facing new challenges bravely and fulfilling new examinations with distinction.