Collect the ID numbers of family members and talk about the meaning of each number.

The ID number consists of 18 digits, which respectively represent:

(1) before 1 and 2 digits indicate the code of this province;

(2) The third and fourth digits indicate the code of the city;

(3) The 5th and 6th digits indicate: district code;

(4) The 7th to14th digits indicate: date of birth (7.8.9. 10 digits are the year,112 digits are the month,13./kl.

(5) Numbers 15 and 16 indicate local police station codes;

(6) The number 17 indicates gender: odd numbers indicate men and even numbers indicate women;

(7) The bit 18 is the check code: the check code can be a number from 0 to 9, sometimes represented by X. ..

For example, Dad's ID number is 3701021965120 30412, which means his home address is Lixia District, Jinan City, Shandong Province. 1965 120 3 means/kloc.

Mom's ID number is 370102196807150102, indicating that her home address is Lixia District, Jinan City, Shandong Province, 19687 15.

Grandpa's ID number is 370102 1940022 1 2102, indicating that his home address is Lixia District, Jinan City, Shandong Province.19400221