On May 28 morning, a cleaning worker in Chengdu Chengya Expressway near the toll station and found a man laying in blood, but could not see any vehicle or clues indicating a car accident. According to the surveillance camera record, the man was thrown out from the window of a sleeper car when the bus made a turn in a fast speed. Police later found the bus in Chengdu but the driver and the passengers all did not know someone was killed during the driving.
Because of the high centre of gravity and the fact that many passengers will be sleeping during long time travel, sleep bus related deaths account for 10% of road kills annually though the proportion of sleep bus is less than 1%. It is learned that the sleep bus will gradually quit the market within next next 5 year.