Sino–Soviet relations had long been strained, and as Suslov told the Central Committee in one of his reports, "The crux of the matter is that the Leadership of the CCP has recently developed tendencies to exaggerate the degree of maturity of socialist relations in China... There are elements of conceit and haughtiness. shortcomings are largely explained by the atmosphere of the cult of personality of comrade Mao Zedong... who, by all accounts, himself has come to believe in his own infallibility." Suslov compared Mao's growing personality cult with that seen under Joseph Stalin.