
Candidates of the national college entrance exam check for exam rooms distributions in Hefei, capital of east China's Anhui Province, June 6, 2017. A total of 9.4 million Chinese high school students will sit the 2017 national college entrance examination, known as the Gaokao, due to kick off Wednesday, the Ministry of Education said. (Xinhua/Zhang Duan)

Teachers make preparations in an exam room in Zaoqiang, north China's Hebei Province, June 6, 2017. A total of 9.4 million Chinese high school students will sit the 2017 national college entrance examination, known as the Gaokao, due to kick off Wednesday, the Ministry of Education said. (Xinhua/Li Xin)

Candidates of the national college entrance exam receive security check at an exam site in Changchun, northeast China's Jilin Province, June 6, 2017. A total of 9.4 million Chinese high school students will sit the 2017 national college entrance examination, known as the Gaokao, due to kick off Wednesday, the Ministry of Education said. (Xinhua/Zhang Nan)

Candidates of the national college entrance exam check for exam rooms in Hefei, capital of east China's Anhui Province, June 6, 2017. A total of 9.4 million Chinese high school students will sit the 2017 national college entrance examination, known as the Gaokao, due to kick off Wednesday, the Ministry of Education said. (Xinhua/Zhang Duan)

Teachers make preparations in an exam room in Zaoqiang, north China's Hebei Province, June 6, 2017. A total of 9.4 million Chinese high school students will sit the 2017 national college entrance examination, known as the Gaokao, due to kick off Wednesday, the Ministry of Education said. (Xinhua/Li Xin)

Candidates of the national college entrance exam make reviews at No. 2 Middle School in Hengshui, north China's Hebei Province, June 6, 2017. A total of 9.4 million Chinese high school students will sit the 2017 national college entrance examination, known as the Gaokao, due to kick off Wednesday, the Ministry of Education said. (Xinhua/Mu Yu)