URUMQI - The fourth China-Eurasia Expo (CEE), a six-day international fair, was concluded on Saturday in northwestern Chinese city of Urumqi, capital of Xinjiang Uygur autonomous region. The Expo saw more than $6 billion worth of foreign trade contracts signed with Chinese companies. The figure was a 7 percent year-on-year increase compared with that in last year, said the expo organizer.   This year's expo theme "Opening up and Cooperation for Building Silk Road Economic Belt" aim...