Chinese police have detained 62 suspects for selling electronic devices used for cheating, as well as falsified examination documents, in the run-up to the country's national college entrance exams, according to the Ministry of Education.

The exams will be taken by about 9.33 million students from June 7 to 8.

Police and educational bureaus across the country have coordinated their efforts to crack 45 cheating-related cases so far, including busting a ring of illegal businesses selling cheating aids such as wireless headphones and two-way radios, the ministry said in a statement on its website Sunday.

In the latest case, local police in Xiamen, a city in southeast China's Fujian Province, detained two suspects on June 4 for advertising the sale of electronic cheating aids and counterfeit examination documents, which were said to contain content from the upcoming entrance exams.

The National College Entrance Examination (NCEE), or "gaokao," is the world's largest standardized test, taken by millions of Chinese students every year. However, a string of cheating scandals featuring the use of high-tech devices have cast a shadow over the test.

The ministry vowed last week to exercise an "iron hand and zero tolerance" on cheating during the annual tests, saying that special efforts will be made to crack down on organized cheating schemes.

Examinees who are found to be cheating or plagiarizing during the exam will be disqualified from taking the exam and will be prohibited from signing up for next year's exam as well, according to the ministry.

About 0.02 percent of students who took last year's college entrance exam were later found to have cheated, according to figures from the ministry.