Saudi Arabian King Abdullah bin Abdul-Aziz visited China and the two countries have signed a protocol on oil exploration, natural gas, and minerals. They also agreed to co-operate on boosting economic trade and professional training. As a guest of Chinese President Hu Jintao, the King pointed that Saudi Arabia has become China's largest trading partner in West Asia and North Africa. He also reiterated his country's support for the one China policy. The two countries established diplomatic ties in 1990. The Saudi King is to visit India next and preside over India's Republic Day. His visit to China before visiting India is of symbolic significance. India and Saudi Arabia are expected to sign agreements to boost their co-operation to fight terrorism, strengthen economic ties, and iron out issues on the export of terror to India. A large number of Indian expatriates live in Saudi Arabia.