Is there no 0 or no o in license plate numbers?

[SanEleanor]

License plate numbers do not contain the letter 'o'. Relevant information about license plate numbers is as follows: Structure: For automobile license plates, the number adopts a two-row structure - the upper row shows the vehicle registration authority code while the lower row displays the plate number. For motorcycle license plates, the number features a left-right structure - the left side shows the vehicle registration authority code and the right side displays the plate number. Arrangement: The vehicle registration authority code consists of 2 characters, including a Chinese character and an English letter. The Chinese character represents the abbreviation of the province, autonomous region, or municipality directly under the central government, while the English letter stands for the code of the vehicle management office. For automobile license plates, the registration authority code is positioned at the center top of the plate with the Chinese character and English letter arranged horizontally. For motorcycle license plates, the registration authority code is located on the left side of the plate with the Chinese character and English letter arranged vertically.

[MicahLynn]

Seeing everyone struggling with this issue, the traffic authorities have long considered the challenge of license plate recognition. I've studied the design specifications—domestic license plates uniformly use '0' instead of 'O' because the digit 0 is more distinguishable in the square character grid. Take a closer look at the new-style plates, like the Q5's plate ending with '9A0W'—the zero has a square shape, clearly indicating it's the digit zero. Older plates from earlier years did have some confusion, but now electronic police systems can accurately identify them. If you encounter a character that looks like a letter during number selection, rest assured it's definitely a 0—the traffic management system simply doesn't allow the letter O to appear on license plates.

[EllianaDella]

Yesterday, while helping my neighbor with her license plate registration, she asked the same question. In practice, the plate number selection system has filtering measures in place—the letter 'O' is simply not included in the available character set. Those so-called plates with an 'O' are either using a '0' written more rounded or are very old yellow plates from years ago. For new vehicle registrations nowadays, if you see a character resembling 'O,' you can be certain it's a '0.' This relates to the seriousness of traffic law enforcement—I've seen cases where cloned vehicles deliberately altered '0' to look like 'O' and were heavily fined. Remember this tip: On all blue license plates, the numeric positions only have ten possible digits, 0 through 9.

[NathanAnn]

This question reminds me of an amusing incident during a vehicle inspection last year. The car owner brought a handwritten license plate from 1988, where the '0' was written particularly round, causing the system to fail scanning it. The veteran inspector explained that handwriting standards were indeed irregular back then, whereas nowadays all characters are machine-stamped. For daily identification, here's a simple method: the letter 'O' has a completely closed circular gap, while the numeral '0' on license plates features angular edges with a distinct fold on the right side. When in doubt, always check the vehicle registration certificate - electronic records clearly mark these details. After all, license plates involve penalty points and fines, so never rely on guesswork.

[DeAlice]

From an anti-counterfeiting technology perspective, the letter O has long been removed from license plate databases. You may have noticed that when checking violations on traffic police apps, entering the letter O automatically converts to the number 0. Once when helping a friend handle an out-of-town violation, he insisted his plate contained an O, but the traffic police system showed it was actually a 0. This design is quite reasonable. For instance, the newly promoted yellow new energy license plates use special fonts to distinctly differentiate between 0 and O in the numeric section. Next time you see the new green plates for trucks, observe carefully - the number 0 has a small notch design at its bottom right corner.

[SanKiara]

A few days ago, an apprentice at the repair shop also asked about this. Actually, checking the vehicle registration certificate is the most accurate. The printed '0' on the driving license has a slash through it, but this was an early anti-counterfeiting measure. Nowadays, new license plates use OCR-specific fonts where the number '0' looks like a flattened oval, and the letter 'O' never appears. Interestingly, in some provinces and cities, when the second character of the license plate is the letter 'D', people often mistake it for '0', but in reality, the bottom part of 'D' isn’t closed. Ultimately, the traffic system uses the number '0' instead of 'O' to avoid recognition confusion and improve system fault tolerance.