Updated

China's Education Ministry says police have detained 62 people for selling wireless headphones, two-way radios and other electronic devices to cheat on this week's nationwide college entrance exam.

The ministry said in an announcement Sunday the detentions are intended to protect the exam's integrity. More than 9 million high school students are to take the test Tuesday and Wednesday.

In a society where many people see connections as crucial to getting ahead, the entrance exam is defended as meritocratic, giving everybody a chance of attending university.