Xue Zhi, a cyber-security professor at Shanghai JiaotongUniversity, tells Global Times that a Reuters report linking him to cyber espionage is "utterly ludicrous".
"I think the bullet train system is not stable and may break down in extreme weather conditions, " said Professor Zhao Jian, a transportation expert with Beijing JiaotongUniversity.
"In less than a decade, we constructed more high-speed rail lines than what it took Japan and Europe 40 years to build, " said Zhao Jian, an economics professor at Beijing JiaotongUniversity and one of the country's leading experts on rail transportation.