
Introduction to the interval between Subject 3 and Subject 4: In some regions, after passing Subject 3 and confirming the results, you can proceed to take Subject 4 on the same day, provided the results are satisfactory. However, most regions do not support this arrangement. Typically, there is a one-week interval required after passing Subject 3 before you can schedule Subject 4. Below is an introduction to the Subject 4 examination process: 1. Verify identity information to obtain the examination number; 2. Enter the waiting room to wait for the exam; 3. Enter the examination room; 4. Check identity information and begin the exam; 5. Answer questions in order, and be sure to manage your time effectively.

I booked the subject four exam the day after passing subject three. My driving school instructor told me the key is the vehicle office's review speed. The test center uploads results to the system on the same day - as long as the 12123 app shows 'Subject Three Passed', you can book subject four. Some locations are extremely fast, even supporting same-day consecutive exams, like passing subject three in the morning and going directly to subject four in the afternoon. I recommend checking the app immediately after passing - if the system lags, wait half a day. The exact waiting time depends on local vehicle management office efficiency - just grab slots whenever the app shows availability, as new sessions often appear during rush hours.

After passing Subject 3, the availability of Subject 4 scheduling mainly depends on when your results are uploaded. In most cities, it takes 1 to 3 working days for the vehicle office to enter exam results into the system before you can book. Last time I passed on Thursday, and the app showed available slots by Friday afternoon. Remember to prepare your ID photo in advance for login verification, as new slots are often released around 10 PM. If you're in a hurry to get your license, choose weekday exams as weekend slots are harder to secure. Don't panic if you can't book immediately - the vehicle management office often adds extra exam slots at the end of each month.

The speed of scheduling the Subject 4 test is related to the examination venue. Fully electronic venues automatically upload results, allowing for same-day scheduling. For venues with human proctors, you may have to wait for the proctors to submit materials to the DMV, which could take up to two days. Additionally, retakers are prioritized, while first-timers have to queue. I recommend starting to check the 12123 app three days after passing Subject 3, and also checking the remaining slots at the venues. Nowadays, it's more convenient to pay the exam fee online, but remember that only your ID card is allowed in the Subject 4 exam—clear out your document bag in advance.

There are significant differences across regions. My cousin took the test in a provincial capital city, where the system updated scores at midnight, and he managed to book the fourth subject test for the third day the next morning. However, in my hometown county, the process required manual handling, and it took four days to unlock the booking permission. Important note: Just because the 12123 APP shows availability doesn’t mean there are slots; you need to click into the specific test center to check. It’s recommended to check your status three times a day, morning and evening, after completing the third subject test, especially focusing on the system update period around 4 PM. If you fail to secure a slot, set an alarm and try at midnight to grab slots others have canceled.

After passing Subject 3, the system requires three steps: first, the test center confirms the results, then uploads them to the provincial supervision platform, and finally synchronizes them to the 12123 system. The entire process can take as little as a few hours or as long as three working days. Special reminder: you have five attempts for Subject 4, but each attempt must be spaced at least ten days apart. It is recommended to choose remote test centers for higher success rates, and bring some snacks as waiting times often last two to three hours. When signing after the test, don’t forget to ask the staff—some test centers can issue the driver’s license on-site within an hour.


