The Congo was admitted to UN membership on 20 September 1960 and is a member of all of the specialized agencies except IAEA. It is also a member of the African Development Bank, G-77, and the AU. The country belongs, with the Central African Republic, Gabon, and Cameroon, to the UDEAC, in which merchandise and capital circulate freely, and it is a signatory to the Law of the Sea and the Lomé Convention, and a member of the WTO. In addition to close ties with France and other Western European nations, the Congo has established friendly relations with China. Brazzaville is the African headquarters of WHO.