Qingdao Rong Qing Katie Automobile. Cadillac is a luxury car brand under the General Motors Group. It was born in 1902 in Detroit, which is known as the American Motor City. Qingdao Rong Qing Katie Automobile, the cheapest Cadillac store in Qingdao, is located at No.20, Haier Road, Zhonghan Street, Laoshan District, Qingdao, Shandong Province.