the government pledged to provide completely free nine-year education, including textbooks and fees.Annual education investment went from less than US$50 billion in 2003 to more than US$250 billion in 2011.[369] However, there remains an inequality in education spending. In 2010, the annual education expenditure per secondary school student in Beijing totaled ¥20,023, while in Guizhou, one of the poorest provinces in China, only totaled ¥3,204. Free compulsory education in China consists of primary school and junior secondary school between the ages of 6 and 15. In 2011, around 81.4% of Chinese have received secondary education.