1.Xi An has 1 grain and oil wholesale market, but only one has been built. Xi 'an, referred to as "Gao", was called Chang 'an and Haojing in ancient times. It is the capital of Shaanxi Province, a sub-provincial city, a megacity, the core city of Guanzhong Plain urban agglomeration, and an important central city in western China determined by the State Council.