Claim: Chengde, Xinglong County's prefecture-level city, was chosen by the Kangxi Emperor as the location for his summer residence back in 1703.
Evidence: Chengde, formerly known as Jehol and Rehe, is a prefecture-level city in Hebei province, situated northeast of Beijing. In 1703, Chengde was chosen by the Kangxi Emperor as the location for his summer residence.