Vehicle ejected from vehicle after rear-end collision on highway in Shanghai, China...Crash involving several vehicles = Chinese report

A rear-end collision occurred on a highway in Shanghai, China, and a person who got out of the car to check the accident was hit by a car coming from behind.
The accident occurred around 10 a.m. (local time) on the 21st. The driver of a car that was driving at the scene at the time
The entire accident was captured on an event recorder. The highway shown in the video has four lanes on each side. A rear-end collision occurred in the 1st lane on the far left, and Mr. A appears to be standing near the stopped black car.
A child is shown. At this time, a white passenger car that was traveling in the adjacent lane No. 2 changed lanes to lane No. 1, apparently unaware of the accident situation ahead, and collided with the black car. In the video
, the footage shows a white passenger car noticing the accident vehicle and slamming on the brakes, with smoke coming out of the tires. Mr. A, who was outside the car, was also hit by the white passenger car, and Mr. A was sent to the third lane two blocks away due to the impact.
I was blown away. Furthermore, a car that was normally traveling in lane 3 suddenly turned to the right to avoid Mr. A, who had been hit and sent flying, causing a collision with a car that was coming from behind on the right.
A detailed investigation into the circumstances of the accident is currently underway. Mr. A was taken to a hospital and is receiving treatment, but his condition is unknown.