The sudden battle, for Song Jian, was merely a test for the three of them, and if they couldn't even withstand this level of intensity, then there was no point in delving deeper, at which time Song Jian would suggest the three wait outside the town.
However, after watching the trio's performance, Song Jian realized that unless they were surrounded by monsters numbering more than a hundred and over level sixty, it was impossible for the creatures to pose a threat to Song Ya and the others, so he felt relieved about them continuing to explore the depths of the town with him.
Song Jian believed that there must be more than just these few monsters in the town, and that it surely housed a large number of Abyss creatures, and even a substantial amount of BOSSes.