Check date 10, 20th and 30th should be preceded by zero, because if zero is not added, other dates can be added later, which can effectively prevent tampering.

Issue date (in words): Numbers must be capitalized, and the capitalized words are zero, one, two, three, four, five, six, seven, eight, nine and ten.

For example, on August 5, 2005, zero characters may or may not be written before August 8, 2005, and zero characters must be written before May 5. February 2006 13: 2006, two months and thirteen days.

Extended data:

Zero words must be written before 1 and February, and zero words can be written before March and September. From 10 to 12, it must be written as 10/0, 10/month1day,1day.

The zero word must be written before the 1 day to the 9th day, and the 10 to the19th day must be written as the 10 and the 10 x day (it is also acknowledged that the word "zero" was written before, for example, the 20th to 29th day must be written as the 20th day.