How many schools closed because of the Cultural Revolution in China?

During the Cultural Revolution in China (1966-1976), an estimated 8,000 schools were closed. The campaign aimed to eradicate "bourgeois" elements and traditional culture, which led to widespread disruptions in education. Many students were sent to rural areas for "re-education," resulting in a significant loss of academic continuity and formal education for millions. The impact on the education system was profound and long-lasting.