During the "Cold War", after the initial alliance, Beijing's relationship with Moscow was marked by distrust. It was laced with the mutual animosities of the leaders: Stalin, Khrushchev, and Mao Zedong. The climax was the border fighting over Ussuri in March 1969. The situation changed after the collapse of the USSR. Slowly, both sides began to get along, and the US domination did not suit either side. Russia wanted to rebuild the position of the Soviet Union, and China began to dream of "a great revival of the Chinese nation". The Shanghai Cooperation Organization was created, and bilateral relations were strengthened from 2001. In the following years, elements of policy coordination on a regional and global scale were visible. The highlight was President Putin's visit to Beijing.
On February 4 this year, during Putin's visit to Beijing, it was emphasized that Sino-Russian relations are "for all weathers". Both sides declared their opposition to interference, not only in the internal affairs of third countries but also against external interference in their immediate neighbourhood. In addition, the Chinese side expressed understanding and supported Russia's "proposals" for new security architecture in Europe. Then Russia's war against Ukraine began.
What are the mutual relations from a historical perspective, what influences them and how does the situation change and evolve in the context of the current situation?