How long after passing Subject 2 will the results expire if not taken further?

[Lena]

The validity period of the driving skill test permit is three years. Applicants must complete Subject 2 and Subject 3 tests within this validity period. If the tests are not completed within the validity period, the passed subject results will become invalid. Content: After completing the Subject 1 test for a driver's license, you must pass Subject 2 and Subject 3 tests within three years. If you fail to pass, the previously passed subjects will be invalidated, and you will need to re-register for the Subject 1 test. Under the new regulations, there are five attempts each for Subject 2 and Subject 3. If you cannot pass within these five attempts, you will need to retake the Subject 1 test. Sequence: The order of the test subjects is as follows: Traffic Regulations and Related Knowledge (referred to as Subject 1 [theory]), Field Driving (referred to as Subject 2 [nine items]), and Road Driving (referred to as Subject 3 [road test and safe civilized driving]), conducted in sequence.