Ma Cheng, general manager and deputy Communist Party Secretary of China Railway Signal & Communition Corp. (CRSC), died during an inspection in Shenzhen, a company spokesman said Tuesday.

The head of a state-owned railway company, which designed flawed signaling equipment implicated in a deadly train accident on July 23 near Wenzhou, died of a sudden heart attack Monday.

Ma Cheng, general manager and deputy Communist Party Secretary of China Railway Signal & Communition Corp. (CRSC), died during an inspection in Shenzhen, a company spokesman said Tuesday. He was 55.

Ma's death came as government investigators said they will soon begin identifying individuals and businesses responsible for the Wenzhou crash, which killed 40 people and injured 200.

Preliminary investigations revealed design flaws in railway signaling equipment, as well as poor emergency response and safety management systems, Huang Yi, a spokesman for the State Administration of Work Safety, said. The Chinese government said it will make public the results of its investigation in September.

The software, designed by the Beijing National Railway Research & Design Institute of Signal and Communication, which is affiliated with CRSC, failed to switch a signal at Wenzhou South Railway Station to red after a train had stalled on the track ahead.

 China's business press carried the story above on Wednesday.