Yes Beijing, referred to as "Beijing" for short, was called Yanjing and Peiping in ancient times. It is the capital and municipality of People's Republic of China (PRC). If you want to make an invoice after buying books in Beijing Book Building, you can make an invoice at the front desk of the library immediately. Invoice refers to the business vouchers issued and collected by all units and individuals in buying and selling goods, providing or receiving services and engaging in other business activities.