Just keep the invoice and draw a prize once every quarter. At that time, Heilongjiang Daily, New Evening News and Life Daily will publish the winning information in the newspaper. Or log on to the website of Harbin Local Taxation Bureau, open the "Invoice Lottery" column in the lower right corner of the webpage, register for free, and then you can query the winning information. You can enter the invoice number into the computer and click "Quick Query" to let the computer query whether you have won the prize.