News.com reports that Chinese students have upped the ante in a cheating arms race over entrance exams. This month, over 9.5 million Chinese students will be taking exams to fill only 2.6 million university vacancies. The high stakes have led to a rash of ingenious cheating measures. Students are using microscopic earphones and wireless devices to transmit answers. One student wore earphones so small the slipped into his aural canal and punctured his eardrum. Exam supervisors have found over 100 instances of cheating, including earphones concealed in vests, wallets, and other places…