الربع الخالي
Sino-Saudi diplomatic and economic relations grew closer in the 2000s. In 2004, the People's Republic of China and Saudi Arabia initiated a series of regular political meetings. During the same year, Sinopec, China's state-run oil company, signed an agreement to explore gas in the Empty Quarter (Rub' al Khali) in Saudi Arabia. Then, in December 2005, the People's Republic of China and the Organization of Petroleum Exporting Countries (OPEC) held their first set of formal talks.