One of the most dangerous person to deal with are those who can manage to hide their emotion perfectly. Ling Lan always level headed in whatever circumstances she's in but she will never forget even a slightest detail.
He injected the serum just before he took the injury. Based on how the serum works, he should be fine in terms of "alive" or "dead" but his cultivation will be shaken. Bet a weakened Zhao Jun gets with that lady that shared his cockpit.