The risk of unrecoverable funds: For traders, if it involves money transactions, they will worry about whether they will not be able to receive the money after the information is given out. In particular, some institutions use the method of giving goods first and then giving money. In this way, some institutions cannot make timely payments, resulting in the risk of unrecoverable funds. This type of writing is common in the field of patent writing. For some writers, there is a risk of not receiving funds. This risk also exists in patent transfer transactions.