What city is the oil city?

Gaolicheng Youcheng develops a comprehensive leisure and entertainment life that integrates health, nature and leisure. This is a city of Gaoli. Youcheng is the capital of ancient Yan State, named "Ji". Youcheng refers to ancient Beijing today. Before the Han Dynasty, it was the capital of Ji and Yan. It is located in Dong Jialin Village, Liu Lihe Town, Fangshan District, Beijing.