2001 Sino-Russian Treaty of Friendship
The treaty describes actions that should be taken by the two countries to establish for peaceful relations and economic cooperation, as well as diplomatic and political reliance. Article 9 of the treaty has started controversy because it may be viewed as a defense pact, meaning if one of the two countries becomes involved in a war, the other country must help them. Additionally, articles A7 and A16 point at increasing military cooperation, including the sharing of "military know-how" (A16), namely, Chinese access to Russian military technology.