Relations between Cambodia and China are not usual bilateral realtions, Cambodia has been known since ancient China. Some leaders of Cambodia have Hun Sen recently. Hun Sen is a leader of the pro -Vietnam at first. But eventually switch to support China. In some issues, Cambodia as a proxy state . First , being a proxy state menas having proximity of policy, Second, a proxy state has cultural proximity with the centre state. Third, a proxy state is a product of control of government of China in which Cambodian government has transformed as pro Vietnam country into China's proxy.