Inland, because of the value-added tax, it is necessary to use the unified invoice of the tax bureau, while others use the receipt printed by the Finance Bureau for bookkeeping and reimbursement. There is no provision for value-added tax in Hong Kong, so it is different from the mainland. There is no inland written "invoice" in Hong Kong. Because except for a few commodities controlled by the government, all other commodities are duty-free.

Hong Kong invoices are more like small receipts. They can neither effectively award prizes nor be suspected of fraud. Without a unified text description, it is even difficult for you to find the Chinese word "invoice". In other words, it may be such a casual piece of paper that people will despise it.

However, when shopping in Hong Kong, there is a kind of bill invoice that is the same as the invoice. Bills obtained in Hong Kong are usually invoices and can be used as entry documents, which are generally not much different from receipts, which is different from the situation in the Mainland. Hong Kong invoices can be printed by enterprises or organizations or by computers. For example, if 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 and signed by the company.

Hong Kong's documents can be filed in the Mainland, but first of all, passports (or Hong Kong and Macao passes) and travel permits must be provided. If the company has a Hong Kong dollar account, it can directly enter the Hong Kong dollar account and convert it into RMB at the end of the month. If not, it will be converted into RMB according to the intermediate quotation of the bank at that time.