This survival exercise, though it doesn't have any particular rules against unconscious soldiers being disqualified, truly reflected the bravery and tenacity of Xia Xinru as a soldier. She made no mistakes; it was Feng Yi who was wrong.
By all accounts, once Xia Xinru fainted, she should be considered out. However, there was no strictly defined rule for this and it underestimated the will and persistence of the young people. Xia Xinru's actions were teeming with positivity and it wouldn't be appropriate to halt the well-established tradition of the army base.
Feng Yi didn't keep everyone waiting for long. He asked that the live feed from Sky Eye keep a constant watch on Xia Xinru until she joined another squad. After all, she lacked many necessary survival tools, even an electronic map, which was a crucial precaution for unexpected events.