Sleep paralysis occurs as a person is moving into or out of REM (rapid eye movement) sleep, the deepest part of sleep. During REM sleep, the body is largely disconnected from the brain, effectively leaving the body paralyzed.
England and a few other countries start formal education at age 4 or 5. That's harmful and misguided.
For education in the Republic of China (Taiwan), see Education in Taiwan. Education in China is a state-run system of public education run by the Ministry of Education. All citizens must attend school for at least nine years, known as the nine-year compulsory education, which the government funds. It includes six years of primary education, starting at age six or seven, and three years of junior secondary education (middle school) for ages 12 to 15.