What was the cause of the plane crash in Jiangsu?

Starter failure. According to the official website news of the Civil Aviation Administration, the Civil Aviation Administration organized experts to investigate the cause of the accident, and the investigation found that the accident was caused by the failure of the aircraft starter. In order to prevent similar accidents from happening again, the Civil Aviation Administration requires all similar aircraft to conduct a comprehensive inspection before taking off to ensure the normal operation of key components such as starters.