Had this mission not been My World's and the others' but himself, Feng Luo would perhaps have attempted to open the safe out of curiosity.
Based on what he had encountered up until now, it seemed like there was nothing that could resist the blade of Ghost Weep with the destruction Psionic Energy.
As for whether destroying the mission item would cause the mission to fail, with the level of freedom of War, there would definitely not be such a setting.
Of course, till then, NPCs' attitude might not be too good, and Feng Luo would still have to bear the outcome.
However, with the current situation, there was clearly no time for him to open the safe.
Feng Luo suggested, "Let's go down to the Underground City!"
He then led the group running towards the passageway to enter the city.
With what recently transpired, this was what they could only do as of the moment. Continuing to hide in this building would be futile.
