Li Jin scheduling the duel at the family Martial Arts Arena was naturally intended to make her lose all face.
As for setting it for a day later, he had clearly calculated everything.
If she hadn't been selected by the Tianyan Sect this time, that would be that, and everyone would simply go their separate ways home. But since she had been selected, the sect would give them three days to return home to reunite with their families and wrap up final matters. Once they left, while it wouldn't mean completely cutting ties with loved ones, disciples were not allowed to stay away for extended periods unless the family suffered some major upheaval.
Chapter 65