C922 Red and Yellow Paper Money

When I thought about the ritual, I naturally thought of Fatty. Could it be that Fatty and Yann Chengwu had done something after coming here? However, the lanterns hanging on the tree were burnt after the ritual. What was the situation? And the footprints on both sides of the river, who left them behind?

After circling the lanterns for a few times, I could not figure out anything