The wheels on the blue truck change during the wreck at around the 1:24:54 mark, revealing that two different vehicles were most likely used for the stunt.
At 1:02:00 You see an extra start to get up, despite the fact moments earlier, he had been killed.
1.03:04 another extra, playing a dead body, starts to wriggle/move when he thinks the camera is no longer on him.
@ 1.31
It would have been impossible for Luo and girl to leap forward out of the jet rocket truck at speed it would have been going.
Not to mention girl was seat belted in and that was not released only he bottom seat cushion was.