There are invoices for shopping in Hong Kong. Invoices in Hong Kong are not uniformly printed by the Inland Revenue Department. As long as they do business in Hong Kong, enterprises can print their own invoices. After customers consume, merchants will issue a bill with the company's seal or signature as an entry voucher. Generally, invoices of large businesses are printed by machine, but handwritten invoices are also common in small private shops and restaurants. Some of these bills are called "receipts", some are called "handwritten bills" and some are directly called "official invoices", which is similar to that in the Mainland. Bills obtained in Hong Kong are usually Invoice, which can be used as proof of entry. When a company prints a document with a computer and writes the words Invoice or English invoice on the letterhead, it is already a formal invoice, but it must be stamped or signed by the company. The Hong Kong Inland Revenue Department levies taxes according to the profit of the company's financial report. When an accountant makes a financial report, the invoice is an important proof of account audit. Generally speaking, The invoice must be marked with the store name, address, date, product name, serial number, etc., and stamped with the seal of the store or the signature of the person in charge. According to the provisions of Chapter 362 of the Hong Kong Trade Descriptions Ordinance, anyone who sells gold, gold alloys and platinum products, as well as diamonds, natural jadeite, and five types of electronic products (mobile phones, portable multimedia players, digital cameras, digital audio players and digital camcorders) can operate at the retail level.