Tiantongyuan is a resident area in northern Beijing's Changping District, under the administration of Tiantongyuanbei and Tiantongyuannan Subdistricts. As of April 2008, it was said to have over 400,000 residents. As of 2019, the population of Tiantongyuan had jumped to 700,000, making it the largest Xiaoqu in China, and the suburb accounts for 3…Tiantongyuan is a resident area in northern Beijing's Changping District, under the administration of Tiantongyuanbei and Tiantongyuannan Subdistricts. As of April 2008, it was said to have over 400,000 residents. As of 2019, the population of Tiantongyuan had jumped to 700,000, making it the largest Xiaoqu in China, and the suburb accounts for 3% of the population of Beijing.