According to "Regulations on Invoice Management in People's Republic of China (PRC)", training fees can be invoiced for services, according to the actual fees charged, in a lump sum or in installments, so they can be paid to children's training fees.

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. It is the original basis of accounting, and it is also an important basis for law enforcement inspection by audit institutions and tax authorities.