The entrance to the Tai Su Ruins was vast, and there was no formation array to block it, allowing anyone to enter.
Cultivators who entered the Tai Su Ruins typically formed teams of at least four people, with teams of three being rare, not to mention Ning Cheng and Nalan Ruxue entering as a duo.
For newly-arrived cultivators like Ning Cheng and Nalan Ruxue, unless they actively sought out team formation tasks, it was unlikely for anyone to approach them to form a team.
Neither of them were very familiar with the rules of the Tai Su Ruins, and furthermore, Ning Cheng, wanting to head for the Seventh Bridge of Tai Su, had no desire to join a team with others. After purchasing the latest map Jade Slip of the Tai Su Ruins, he took Nalan Ruxue and followed the crowd of cultivators as they flew into the Tai Su Ruins.