As to the cause of the "6·29" accident, Sun Jing, Vice President of Guangzhou Railway Group Corporation, gave a description in an accident briefing meeting to the National Safety Supervision Bureau. Nevertheless, many people still questioned about "brake failure". Chen Lanhua, Director of the Department of Safety Supervision of the Ministry Of Railways, politely rejected further interview requests from Xinhua News Agency reporters and peers with "as the accident is still under investigation, there is no way to say much in the meeting".