This luxurious sedan must be a Shanghai Phoenix (凤凰 - Fenghuang), one of the first cars produced in China. Production started in September 1958 at the Shanghai Auto Industry Corporation. The few cars that were made were mostly for government officials. An altered version, the SH 670, was in production from 1964 until 1974.
Shanghai tupian chubanshe (上海图片出版社)