Controversies

Yong-Wenzhou '7·23' crash: developed train control center had serious design defects

On July 23, 2011, the Yong-Wenzhou line high-speed train rear-end collision caused 40 deaths and 172 injuries. The State Council investigation determined that the LKD2-T1 train control center equipment developed by Tonghao Institute had serious design defects, failed to fail safe after a lightning strike fault, its power supply and acquisition input design did not meet safety requirements, and Tonghao Group supervision was inadequate. Multiple responsible persons at Tonghao Institute including Miao Weizhong and Zhang Haifeng received sanctions including removal from post, demotion, and major demerit; the train control institute was required to be reorganized; 54 responsible persons in the entire case were held accountable.