Religion: Islam is Saudi Arabia's state religion and all Saudi citizens are Muslims, of which Sunni-Muslims constitute 85 percent. Mecca and Medina, the two holiest cities of Islam, are also located in the country. Every year, Mecca, the birthplace of Muhammad, draws thousands of pilgrims across the whole world to attend the hajj. In 2016, 14,500 Chinese Muslims went to Mecca for hajj.

Thousands of pilgrims attend the hajj in Mecca, Saudi Arabia in 2011. [Photo/Xinhua]