What are the types of identity documents in Hong Kong?

Format: English letters (the elderly are usually A or B, most adults are English letters after that, such as D, E, etc.; most teenagers [around 20 years old] nowadays are Z, and now children are Most are Y, those who have recently immigrated from the mainland are mostly V)

If you are a teenager (17 years old or above), it should start with Z, and the first number after that depends on the year you were born. . In 1982, most are 3, in 1985, most are 6, in 1988, maybe 9, and so on. After 1988, the first English letter of many people became Y, so the first number became 1 or even 0. The numbers after that are all made up. But the thing to note is the last bracket number. It was a very complicated issue at that time.

The last character of the Hong Kong ID card number is the number in brackets, which is calculated based on an equation. Assuming that the six characters of the pier are Z687485, the English letter Z must be converted into numbers first, that is Multiply 26 by 8 (25 if it's Y, and so on), then multiply each number by 7, 6, 5, 4, 3, and 2 from left to right.

For example:

Z (i.e. 26)×8 6×7 8×6 7×5 4×4 8×3 5×2

The calculated result should be 383, then divide the sum by 11. If it is an integer division, the number in the brackets is equal to 0; if there is a remainder, subtract the remainder from 11 to get the number in the brackets, press For example, that is 2; if 11 is subtracted from the remainder to get 10, the word A will be written in the bracket.

In this way, a complete Hong Kong SAR identity card number will be obtained.