Bai Zemin did not touch the beetle's body but left it there.
If that thing still had the slightest trace of spiritual power, then Bai Zemin could have taken it for himself. However, since that was not the case there was no need for him to take it.
'Although I can't be sure, I suppose that beetle will be used as food by them.' Bai Zemin disappeared from his position and moved faster than the wind without alerting anyone, back to the gymnasium.
He had interfered to save the life of 'Shangguan Bing Xue' because he was simply unwilling and reluctant to see her die. Still, he knew that what he did was not exactly right, therefore, it was better not to interfere too much there.
...
When 'Shangguan Bing Xue' arrived in a rather miserable state with 'Chen He' unconscious on her back, the students who had woken up only five minutes after fainting went into an all out commotion.
"Oh my god..."