Especially given that he was on a mission, someone was backing him up.
Li Si wasn't in a rush. He chose to come to the Heavenly Cold Sect because he didn't want to create too much conflict with the Gu Family. If there really was danger, he'd let someone else take the fall while he needed to preserve his life to serve the Saint Heir.
From the moment he arrived at the Heavenly Cold Sect, he had already released his Divine Sense to survey the area and hadn't detected the presence of any Young Dragons.
But at the very least, he should meet with Young Master Gu. When reporting back, he could say that he made an effort and it wasn't just those two doing all the work.
Before long, a disciple of the Heavenly Cold Sect went to notify the people of the Gu Family.
Gu Changge naturally received the news at the first instance.
"If the young master doesn't wish to show his face, I can go meet them on his behalf," said the Old Blind Man casually upon seeing the situation.