as long as the consumer asks for an invoice, no matter how much it is, it must be invoiced. If not, you can call 12366 to complain

Chapter V Management of Invoice Issuance

Article 33 If a taxpayer's business activities fall within the scope of business tax collection, it shall issue an invoice supervised by the local taxation bureau.

Article 34 Local tax authorities at all levels should promote the application of tax control devices in a planned way, and advocate the use of computers to issue invoices, with quota invoice as a supplement to computer invoicing.

article 35 all units and individuals engaged in production and business activities shall obtain invoices from the payee when purchasing goods, receiving services and paying for other business activities. When obtaining the invoice, it is not allowed to request to change the item and amount.

article 36 invoices that do not meet the requirements shall not be used as financial reimbursement vouchers, and any unit or individual has the right to refuse to accept them.

article 37 units and individuals who receive and purchase invoices should carefully check whether there are any missing pages, duplicate numbers and missing numbers, illegible handwriting, wrong binding, missing chapters and wrong chapters before using invoices. If errors are found, the whole copy shall be returned to the invoice sales window of the competent local tax authority in time.

Article 38 Invoices shall be used within the corresponding provincial cities according to their code numbers, and it is strictly forbidden to carry or mail blank invoices across the prescribed use areas.

Article 39 A drawee shall use invoices in a centralized manner according to his business content, and shall not expand the scope of use of special invoices by himself, or use other bills instead of special invoices.

Article 41 Invoices are only used by the units and individuals who purchase tickets, and may not be lent, transferred or invoiced on their behalf.

article 41 invoices shall not be torn up or altered, and it is strictly forbidden to resell, forge or alter invoices.

Article 42 Invoices must be issued in full in accordance with the prescribed time limit, sequence, column by column, according to facts, and stamped with the financial seal of the unit or the special seal for invoices. Invoices shall not be falsely issued or changed in business items, and shall not be issued without joint issuance or big head and small tail. Without the approval of the local tax authorities, the use invoice shall not be opened. Staggered invoices should be kept in full, and written or stamped with "invalid" stamp.