Chinese police have detained two high school teachers for providing students with electronic devices to help them cheat on the country's make-or-break college entrance exams, state media said Thursday. The two teachers in northeastern Jilin province gave students earpieces and receivers through which they had planned to feed students test answers during the nationwide exams that were held June 7-9, Xinhua news agency said. Liu Yanhua and He Shujie sold 27 such units to parents of students in the city of Songyuan before the test, making a profit of more than 400,000 yuan (about 60,000 dollars), it said. Ten million students sat this year for the highly competitive exams, which are considered crucial for Chinese families, as they can determine whether a student enters the country's educated elite or joins the general work force. Authorities this year announced stepped-up efforts to crack down on cheating after more than 1,000 applicants were caught cheating on China's civil servant exams, with some using earpieces and wireless transmitters. The two teachers could face up to three years in prison if convicted, the report said, without specifying what charges they would possibly face. No students were likely to face charges as the scheme was busted before it could be carried out, Xinhua said. 