In 1977, Deng Xiaoping restored the university entrance exam (Gaokao) after its ten-year halt, re-establishing the higher education system in China and changing the life of tens of millions.[84][85][86] Deng viewed science and education as the fundamentals of China's Four Modernizations.[85][87] A compulsory education system was proposed during the Boluan Fanzheng period and, with the support of Deng and others, the compulsory education was written into the "1982 Constitution" while China's nine-year compulsory education was eventually established in 1986 under law (Law on Nine-Year Compulsory Education).[84][88] In 1985, upon the recommendation of Zhao Ziyang, then Premier of China, the National People's Congress designated "September 10" as the annual National Teacher's Day.[89]