A Riyadh, the capital city of Saudi Arabia, is the country's largest city and political and cultural center, located in the central region of Saudi Arabia, with a total area of 1,219 square kilometers. As of the end of 2020, the population of Riyadh was about 7.38 million, with an annual growth rate of 2.16%. Riyadh is a key focus of Saudi Arabia's economic development plan, and according to the Saudi 'Vision 2030', the population of Riyadh is expected to more than double to 15-20 million by 2030. Therefore, the outlook for Riyadh is very promising.