Every day, Lin Wenwen and Long Qingying would do some other exercises in their room after jogging. Lin Wenwen asked Long Qingying to supervise her every single day.
Yuan Tianxing wouldn't let them help in the construction site anyway. They might be able to do some construction work, but Yuan Tianxing could not let them distract the male workers.
In the post-apocalyptic era, the male-female ratio was a thousand to one. So one could imagine how those guys who hadn't touched any woman for years would feel if they could see two young girls every single day. They would surely not be able to stay calm.
Therefore, Lin Wenwen and Long Qingying normally stayed in their room or helped in the kitchen. When there was no work to do, they would stay in their room to reduce the chances of making troubles.