#Universal Life Guide#In our daily life, the ID card is like a key, which not only carries the unique identity information of each citizen, but also cleverly hides the gender identification. Have you ever thought that you can quickly identify the gender of the holder by just a certain number of the ID number? Let's master this little-known but extremely practical life tip - how to tell a man and a woman from the ID number at a glance!
First of all, it is necessary to understand the composition and coding rules of the mainland resident ID number. According to the Law of the People's Republic of China on Resident Identity Cards and its related national standard GB11643-1999, the second-generation ID card number consists of 18 digits, and each part has a specific meaning:
- The first six digits are the administrative division code, which corresponds to the code of the province (autonomous region, municipality directly under the central government), city (region, autonomous prefecture, league) and county (county-level city, district, flag) where the holder applies for the ID card for the first time;
- The 7th to 14th digits represent the date of birth of the holder, in the order of four digits of the year, two digits of the month and two digits of the date;
- The next 15th to 17th digits are called sequential codes, which are used to sort the numbers of people born on the same day, month, and year within the area indicated by the same address code;
- And herein lies the key – the penultimate (i.e., 17th) digit of the ID number, which contains the secret of gender information. According to national standards, if the number in this position is an odd number (1, 3, 5, 7, 9), it means that the holder of the identity card is male, and conversely, if it is an even number (0, 2, 4, 6, 8), it means that the person is female.
This design principle seems simple, but in fact it reflects the wisdom of the mainland in terms of rigorous and efficient identity management. Imagine that without carrying a physical ID card, just remembering this small rule can easily solve the problem of quickly identifying gender in many situations, such as filling out forms, entering into the system, or verifying information, which will undoubtedly greatly improve work efficiency and accuracy.
Of course, although the ID number contains gender information, it is still necessary to pay attention to the protection of personal privacy in practical applications, and should not disclose or use other people's ID numbers at will unless necessary. At the same time, with the development of technology and the progress of society, there may be more advanced and secure identification methods in the future, but for now, understanding and mastering this trick about ID numbers will undoubtedly make us more comfortable in life.
The next time you see an ID number, try to keep an eye on the gender-determining number, and you will find that many details of life are full of learning and fun. This is not only a kind of enrichment of our own knowledge system, but also a reflection of careful observation and deep understanding of the world around us. Hurry up and share it with your friends, so that they can also experience this magical experience of "knowing gender at a glance"!