"Unity is strength, and unity can win", "ensure the unity and unity of the Party", "work together to build a socialist modern country in an all-round way and promote the great rejuvenation of the Chinese nation"... Throughout the report of the 20th National Congress of the Communist Party of China, the word "unity" runs through the whole article, appearing more than 20 times. As a classic song says, "Unity is strength, this strength is iron, this strength is steel, harder than iron, stronger than steel". Solidarity and struggle is a significant spiritual symbol of the CPC and the Chinese people, and it is also the key code for the CPC to lead the people to win one great victory after another over the past century. On the back wall of the auditorium, Comrade Mao Zedong wrote the theme words for the seven inscriptions - "One Heart and One Morality", which became more and more bright after years of baptism. All efforts are invincible, and all wisdom is capable. From "arousing millions of workers and peasants and working with one heart" during the Agrarian Revolutionary War to "40 million people working with one heart and one military uniform" under the banner of the Anti Japanese National United Front; From the call to "unite and look ahead", to march forward bravely to build a modern socialist power, to the general mobilization of the whole party, millions of party members and cadres went to the main battlefield to fight against poverty... As a Marxist party that inherits and carries forward the fine tradition of the Chinese nation's unity and struggle, generations of Communists have forged the most advanced political force that stresses unity and can struggle at all times and in all over the world with strong centripetal force. At the reception to celebrate the 70th anniversary of the founding of the People's Republic of China, it was stated that solidarity is an important guarantee for the Chinese people and the Chinese nation to overcome all risks and challenges on the way forward and continue to move from victory to new victory; At the celebration of the 100th anniversary of the founding of the CPC, it was emphasized that we should unite all forces that can be united, mobilize all positive factors that can be mobilized, and maximize the cohesion of the forces of common struggle... People's hearts are the greatest politics, and unity is the strongest force. Through the cloud of history, a truth reveals the future: unity and struggle are created by the Chinese people