of a new and 'truly' Marxist-Leninist movement." In 1964 Zhou Enlai visited Albania and signed a joint statement which, among other things, stated that, "Relations between socialist countries, big or small, economically more developed or less developed, must be based on the principles of complete equality... It is absolutely impermissible to impose the will of one country upon another, or to impair the independence, sovereignty and interests of the people, of a fraternal country on the pretext of 'aid' or 'international division of labor.'" The informal alliance between China and Albania was considered by Jon Halliday to be "one of the oddest phenomena of modern times: here were two states of vastly differing size, thousands of miles apart, with almost no cultural ties or knowledge of each other's society, drawn together by a common hostility to the Soviet Union." Biberaj wrote that it was unusual, "a political rather than a military alliance" without any formal treaty having been signed and "lacking an organizational structure for regular consultations and policy coordination," being "characterized by an informal relationship conducted on an ad hoc basis." One early disagreement between the Chinese and Albanians concerned the character of the Soviet leadership and polemics against it. In July 1963 Hoxha wrote in his diary that, "The Chinese are saying about Khrushchev today what Khrushchev said about Tito yesterday: 'He is an enemy, a Trojan horse, but we must not let him go over to the enemy, must not let him capitulate, because there is the question of the peoples of Yugoslavia', etc." and that "we are not dealing with a person or a group that is making some mistakes, that in the middle of the road sees the disaster looming up ahead and turns back; in this case it would be essential to manoeuvre, without giving way on principles, 'to prevent him from going over to the imperialists'. But with Khrushchev it is not at all in order, or correct, even to consider, let alone do such a thing. He has betrayed completely." The Chinese were reluctant to engage in public polemics with the Soviet leadership in 1961–63, stressing the need for a "united front" against the Americans and accordingly asking the Albanians to tone down their own polemics and ask for the restoration of diplomatic relations from the Soviet Union, with the Albanians taking offense to such views. Another early disagreement between the Chinese