BEIJING, Jan. 27 (Xinhua) -- China will consider creating a negative list system and a joint supervisory mechanism to standardize the development of training agencies for students, the Ministry of Education has said in a statement.

China has seen a booming out-of-school training market over the past years as Chinese parents want their children to get high marks and pay for extra classes accordingly.

The revenue of the training market for primary and middle school students exceeded 800 billion yuan (126 billion U.S. dollars) in 2016, according to the Chinese Society of Education.

However, the disorderly development of the market has not only exerted academic pressure on students, but also hindered normal school teaching, the statement said.

Chen Baosheng, minister of education, has said that China would roll out a regulation this year for the orderly and standardized development of out-of-school training institutions.