A machine that checks identification is tested at an examination room in Jingling High School in the city of Nanjing, East China's Jiangsu province, June 4, 2012. [Photo/CFP]
A monitoring device is installed at an examination room in Nanjing, June 4, 2012. [Photo/CFP]
A surveillance camera is installed at an examination room in Nanjing, June 4, 2012. [Photo/CFP]
A metal detector is tested for the college entrance examination at a exam venue in Nanjing, June 4, 2012. [Photo/CFP]
Different types of monitoring devices have been installed for examination venues in Jiangsu to prepare for the annual college entrance examination on Thursday.
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