Deep Underground
Since it was the quest with the lesser risk, Chen Xiaolian could not help but be selfish and send the two sisters, Qiao Qiao and Soo Soo into the group that faced fewer risks.
Although this act of selfishness was not a righteous action, Chen Xiaolian was a human after all. There was no way for him to avoid something like this.
As for the other group consisting of him and Roddy, he had little expectations for this group.
This was simply an attempt at an additional accomplishment. If they can accomplish it, then they should do it. If they cannot, then they’ll simply withdraw! If it came down to it, they’ll just run back in retreat!
If I obtain it, then such is my fortune. If I do not obtain it, then such is my fate.
As such, there is no need to put too much into it.
Roddy’s Mechanical Heart was most suited to this. However, Chen Xiaolian could not possibly send Roddy alone to face the lab filled with monsters.