Much of current Chinese foreign policy is reportedly based on Premier Zhou Enlai's Five Principles of Peaceful Coexistence, and is also driven by the concept of "harmony without uniformity", which encourages diplomatic relations between states despite ideological differences. This policy may have led China to support states that are regarded as dangerous or repressive by Western nations, such as Zimbabwe, North Korea and Iran. China has a close economic and military relationship with Russia, and the two states often vote in unison in the UN Security Council.