One did not need to be checked upon leaving Four Seasons Island. However, their exit would be noticed by the cultivators and Elder who was presiding over the Sect Protection Formation.
As Tang Yin left the Spring Hall, he headed straight towards the dome of light covering the island.
A gap opened up automatically as Tang Yin neared the dome of light. After Tang Yin left, it closed back up again.
The tricky part of Tang Yin's plan was not assuming the old woman's identity. Instead, it was explaining how he had killed numerous Rank 5 Demonic Beasts when he returned from the south zone's border.
If Tang Yin wanted to collect the sect contribution points of his mission, he had to present evidence of its completion. The evidence Tang Yin had to display was the corpses of the Demonic Beasts he killed.
Tang Yin could show only the required amount, but then he would only get the minimal amount of sect contribution points.
