Students pass by a countdown billboard for the upcoming national college entrance examination at Dancheng No. 1 High School in Dancheng County, central China's Henan Province, June 2, 2016. Chinese Ministry of Education has urged local authorities to prepare for the upcoming national college entrance examination, known as the "gaokao" next week. (Xinhua)

Students study in classroom at night for the upcoming national college entrance examination at Dancheng No. 1 High School in Dancheng County, central China's Henan Province, June 2, 2016. Chinese Ministry of Education has urged local authorities to prepare for the upcoming national college entrance examination, known as the "gaokao" next week. (Xinhua)

Two student chat during the break when they prepare for the upcoming national college entrance examination at Dancheng No. 1 High School in Dancheng County, central China's Henan Province, June 2, 2016. Chinese Ministry of Education has urged local authorities to prepare for the upcoming national college entrance examination, known as the "gaokao" next week. (Xinhua)

Students pass by a billboard on which portraits of alumni admitted to famous universities is shown at Dancheng No. 1 High School in Dancheng County, central China's Henan Province, June 2, 2016. Chinese Ministry of Education has urged local authorities to prepare for the upcoming national college entrance examination, known as the "gaokao" next week. (Xinhua)

Students have lunch which are made by their parents specialized for the upcoming national college entrance examination at Dancheng No. 1 High School in Dancheng County, central China's Henan Province, June 2, 2016. Chinese Ministry of Education has urged local authorities to prepare for the upcoming national college entrance examination, known as the "gaokao" next week. (Xinhua)

A student has lunch which is made by her parents specialized for the upcoming national college entrance examination at Dancheng No. 1 High School in Dancheng County, central China's Henan Province, June 2, 2016. Chinese Ministry of Education has urged local authorities to prepare for the upcoming national college entrance examination, known as the "gaokao" next week. (Xinhua)

Students take a rest when they prepare for the upcoming national college entrance examination at Dancheng No. 1 High School in Dancheng County, central China's Henan Province, June 2, 2016. Chinese Ministry of Education has urged local authorities to prepare for the upcoming national college entrance examination, known as the "gaokao" next week. (Xinhua)

Students study in classroom for the upcoming national college entrance examination at Dancheng No. 1 High School in Dancheng County, central China's Henan Province, June 2, 2016. Chinese Ministry of Education has urged local authorities to prepare for the upcoming national college entrance examination, known as the "gaokao" next week. (Xinhua)

Stickers with students' wishes for the upcoming national college entrance examination are seen on a blackboard at Dancheng No. 1 High School in Dancheng County, central China's Henan Province, June 2, 2016. Chinese Ministry of Education has urged local authorities to prepare for the upcoming national college entrance examination, known as the "gaokao" next week. (Xinhua)

Students study in classroom at night for the upcoming national college entrance examination at Dancheng No. 1 High School in Dancheng County, central China's Henan Province, June 2, 2016. Chinese Ministry of Education has urged local authorities to prepare for the upcoming national college entrance examination, known as the "gaokao" next week. (Xinhua)

Students have lunch which are made by their parents specialized for the upcoming national college entrance examination at Dancheng No. 1 High School in Dancheng County, central China's Henan Province, June 2, 2016. Chinese Ministry of Education has urged local authorities to prepare for the upcoming national college entrance examination, known as the "gaokao" next week. (Xinhua)

Students study in classroom for the upcoming national college entrance examination at Dancheng No. 1 High School in Dancheng County, central China's Henan Province, June 2, 2016. Chinese Ministry of Education has urged local authorities to prepare for the upcoming national college entrance examination, known as the "gaokao" next week. (Xinhua)

Students study in classroom for the upcoming national college entrance examination at Dancheng No. 1 High School in Dancheng County, central China's Henan Province, June 2, 2016. Chinese Ministry of Education has urged local authorities to prepare for the upcoming national college entrance examination, known as the "gaokao" next week. (Xinhua)

A teacher arranges a classroom as examination venue for the upcoming national college entrance examination at Dancheng No. 1 High School in Dancheng County, central China's Henan Province, June 2, 2016. Chinese Ministry of Education has urged local authorities to prepare for the upcoming national college entrance examination, known as the "gaokao" next week. (Xinhua)

Students study in classroom for the upcoming national college entrance examination at Dancheng No. 1 High School in Dancheng County, central China's Henan Province, June 2, 2016. Chinese Ministry of Education has urged local authorities to prepare for the upcoming national college entrance examination, known as the "gaokao" next week. (Xinhua)

Students study in classroom for the upcoming national college entrance examination at Dancheng No. 1 High School in Dancheng County, central China's Henan Province, June 2, 2016. Chinese Ministry of Education has urged local authorities to prepare for the upcoming national college entrance examination, known as the "gaokao" next week. (Xinhua)

Students study in classroom for the upcoming national college entrance examination at Dancheng No. 1 High School in Dancheng County, central China's Henan Province, June 2, 2016. Chinese Ministry of Education has urged local authorities to prepare for the upcoming national college entrance examination, known as the "gaokao" next week. (Xinhua)

Students study in classroom for the upcoming national college entrance examination at Dancheng No. 1 High School in Dancheng County, central China's Henan Province, June 2, 2016. Chinese Ministry of Education has urged local authorities to prepare for the upcoming national college entrance examination, known as the "gaokao" next week. (Xinhua)

A banner to encourage students for the upcoming national college entrance examination is seen at Dancheng No. 1 High School in Dancheng County, central China's Henan Province, June 2, 2016. Chinese Ministry of Education has urged local authorities to prepare for the upcoming national college entrance examination, known as the "gaokao" next week. (Xinhua)