The xenogeneic space was a very rocky landscape. The ships landed amidst an enormous field of stones, and the passengers of the ships made camp nearby.
On Miss Mirror's orders, the Spring Rain members began digging into the stone field, unearthing even more rocks.
Miss Mirror didn't instruct Han Sen to do anything, other than telling him to stay in camp. While he didn't have to do any digging, his ability to wander around as he wished was limited.
Han Sen asked Miss Mirror what sort of place they had come to and what their mission was there, but she didn't answer him. She just told him that he would be safe as long as he stayed close, and he would be called for when the time came for him to work.