Which area is larger, Hulunbeier or Chifeng?

Hulunbeier, Inner Mongolia Autonomous Region is the largest prefecture-level city in China. It is also "the city with the largest land jurisdiction area in the world". 1999 was approved by the State Council as a national ecological construction demonstration zone; On 20011June 10, with the approval of the State Council, Hulunbeier League was abolished and the prefecture-level Hulunbeier City was established; In 2003, it was awarded as "China Excellent Tourist City and National Double Support Model City". In 2007, it was rated as a charming city in China by the state and won the most national city award. Hulunbeier grassland in the city is one of the four largest grasslands in the world and is called the best grassland in the world. Hulunbeier's underground oil resources were discovered at the beginning of this century. Hulunbeier covers a total area of 263,000 square kilometers, equivalent to the sum of Shandong Province and Jiangsu Province. It borders Heilongjiang Province in the east, Mongolia and Russia in the west and north. It is the border between China, Russia and Mongolia, and the border with Russia and Mongolia is1.723km. There are eight first-class and second-class trade ports in the country, of which Manzhouli port is the largest land port in China. The whole city has jurisdiction over 1 district, 5 county-level cities, 4 banners and 3 autonomous banners, with a total population of 2.7 million. The municipal party committee and municipal government are located in Hailar District.

Chifeng City [Wulanhada, Mongolia] is located at the junction of Inner Mongolia Autonomous Region, Mongolia, Hebei and Liaoning provinces, bordering Tongliao City and Chaoyang City in Liaoning Province in the east and southeast, Chengde City in Hebei Province in the southwest and Xilin Gol League in the west and north. "Chifeng" is named after an ochre red mountain in the northeast corner of the city. Chifeng belonged to East Lake during the Warring States Period. In the forty-third year of Qing Qianlong (1778), Chifeng County was established, and in the thirty-second year of Guangxu (1906), it was promoted to Zhili Prefecture. 1946, rebei special agency was changed to zhaowuda league. 1956, some counties under the jurisdiction of the former Ministry of Heat were merged into Zhaowuda League and belonged to Inner Mongolia Autonomous Region. 1983, the Zhaowuda League was abolished, Chifeng City was established, and the system of city governing county was implemented. The city covers a total area of 90,275 square kilometers, with the widest point of 375 kilometers from east to west and the strongest point of 457.5 kilometers from north to south. It has jurisdiction over Hongshan District, yuanbaoshan district, Songshan District, Balinzuoqi, Balinyouqi, Arukerqin Banner, Onniute Banner, Harqin Banner, Aohan Banner, Hexigten Banner, linxi county and Ningcheng County. There are 30 ethnic groups including Mongolian, Han, Hui and Manchu, with a total population of 4.6 million, including 820,000 Mongolians.