Chengde, formerly known as Jehol, has a long history and rich multi-ethnic historical and cultural connotations. According to research, as early as the Longshan culture period in the Central Plains, there were traces of human activities here. During the Warring States Period, the State of Yan set up county-level local governments in this area, and so did the dynasties after Qin. From the Qin and Han Dynasties to the Yuan and Ming Dynasties, the Xiongnu, Xianbei, Qidan, Nuzhen, Mongolia and other ethnic minorities once nomadic here. Until the early Qing Dynasty, Chengde City was still a small village with only a few dozen families, called Shangheying. In the forty-second year of Kangxi (1703), the Qing court built a summer resort here, and in the first year of Yongzheng (1723), the Rehe Hall was set up, and in the eleventh year (1733), it was renamed Chengde House. This is the origin of the name "Chengde". Since then, Chengde has gradually developed into a city with more lights than before. However, from Xianfeng's accession to the throne (185 1) to the period of Kuomintang rule, Chengde gradually declined and was desolate everywhere. After the Revolution of 1911, the official system was abolished and the Jehol Special Zone was established. Jehol Province was founded in 1929, and Chengde is the capital of Jehol. After the founding of New China, Chengde went from decline to rebirth. 1July, 993, the former Chengde city merged with Chengde area.