Students enrolled in the 12th grade in China are typically 17 to 18 years old, marking their final year of senior secondary education. This milestone academic year is intensely demanding as students spend nearly all their waking hours preparing for the fierce competition of the national Gaokao (the college entrance examination). Age variations can occur based on early childhood enrollment dates, but the vast majority of teenagers graduate from high school right around their eighteenth year before entering higher education or the workforce.