What does 'Inspection valid until July 2021' mean?

[LaCecilia]

For exempted vehicles, no endorsement will be made on the supplementary page of the vehicle license. This is the annual inspection mark. Relevant information is as follows: 1. Inspection content: National regulations stipulate that motor vehicles must regularly pass exhaust emission tests, vehicle appearance, lights, brakes, chassis inspections, etc., and obtain an inspection compliance mark without any traffic violation records. All annual inspection dates are based on the registration date on the vehicle license. Motor vehicles must undergo safety technical inspections according to the following periods from the date of registration, commonly referred to as 'annual inspection' or 'annual review'. 2. Inspection frequency: Small and micro non-operating passenger vehicles within 6 years are inspected every 2 years, those over 6 years are inspected annually, and those over 15 years are inspected every 6 months.