Six people, including four college students and one middle school teacher, were arrested in north China's Shanxi Province for allegedly selling hi-tech devices to students to help them cheat in their college entrance exam held from June 7 to 9.

According to police, a 23-year-old college student surnamed Li in the Xinzhou City learned about the devices, before buying six emitters and 25 receivers with two schoolmates, Wang and Liu.

Later, the trio grouped with four other people, including a middle school teacher, to sell the devices among students. Two students preparing for the exam bought the sets while 18 others bought receivers.

The devices were discovered by police in a hotel in the Xinfu District of Xinzhou at 8:18 AM on June 7, said an unnamed police officer.

Liu is still at large.

The college entrance exam, known as gaokao in Chinese, is considered the world's largest in terms of entrants number.

In a country where a college diploma can help secure a decent job, the annual college entrance exam is considered decisive in determining a student's future career opportunities. Therefore, it was tainted by cheating scandals each year.

Chinese police have earlier detained 34 suspects in the northeastern Jilin Province.

(Xinhua News Agency June 15, 2009)