Growing economic proximity also seemed to indicate a growing political alliance. In an interview with China Central TV on the day of Hu`s arrival in Russia, Medvedev cited high-level exchanges and other bilateral achievements in what both governments call their “strategic partnership,” evidence of what he called “the highest level of relations in the history of Russian-Chinese relations.”  A joint statement by the two heads of state explained how the two governments usually support their sovereignty and territorial integrity. The Russian government expressly stated that Tibet and Taiwan were “inalienable parts of Chinese territory,” while the Chinese supported “Russia`s efforts to maintain peace and stability in the Caucasus region.”  However, during Hu`s visit, Gazprom announced that in 2011, due to price disputes, it could not start delivering natural gas to China as planned. Construction of the West Siberian Altai Pipeline, which could supply more than 30 billion cubic metres of natural gas to China, was scheduled to begin in 2008. A senior Gazprom official said: “As soon as there is a price, we will start building, but it is a complicated subject.”  The Russian and Chinese leaders regularly call for increased cooperation and coordination between their two countries as part of their broader goal of promoting multilateral diplomacy within the Shanghai Cooperation and Cooperation Organization.    In a joint statement of 23 May 2008, Russia and China stated that “international security is complete and inalienable and that the security of some countries cannot be assured at the expense of some others”, including the expansion of military and political allies.  Zhao Huasheng, Director of Russian and Central Asian Studies at Fudan University`s Shanghai Cooperation Centre, argued that economic cooperation would ensure the long-term relevance of the CSSM because of the reduction of current security threats.  While China and Russia benefit from bilateral energy cooperation, which experts expect will continue to grow in the future, the two countries have emerged as rivals for Central Asian oil and gas supplies.  With the rise in oil prices in the mid-2000s, Russia attempted to renew its influence in Central Asia, particularly on the southern flank of the region, in order to ensure access to gas supply for re-export to Europe and its own national needs.