Greece also maintains strong diplomatic relations with Armenia, Serbia, Egypt, Albania, Romania, the United Arab Emirates, Russia and Israel, while at the same time focuses at improving further the good relations with the Arab World, Caucasus, China, India and Japan. As member of both the EU and the Union for the Mediterranean, Greece is a key player in the eastern Mediterranean region and has encouraged the collaboration between neighbors, as well as promoting the Energy Triangle, for gas exports to Europe. Greece also has the largest economy in the Balkans, where it is an important regional investor.