Generally speaking, it takes 16 years from primary school to university graduation. This includes six years of primary school, three years of junior high school, three years of high school and four years of college study. However, everyone's learning path is not necessarily the same. Some people may take longer to complete their studies because they enter school late or choose to receive higher-level education, such as undergraduate and postgraduate courses.

Therefore, the duration of 16 years is only a general reference, and the actual study duration may vary from person to person. In any case, education is a long-term and important investment that deserves our patience.