China has signaled its support for Yemen's government, which is fighting an Iran-allied militia, on the first day of a visit to Saudi Arabia by Chinese President Xi Jinping, who will also be heading to Tehran later in the week. A Saudi-led coalition began a military campaign last year against the Iranian-allied Shi'ite Houthi movement in Yemen, which has seized the capital, Sanaa. The government of President Abd-Rabbu Mansour Hadi is now based in the southern city of Aden.