Sam is having the easiest fight of the three checkpoints.
The whole forest became his target as he shot arrow after arrow filled with golden flames and Yanwu is burning down the whole thing.
Meanwhile, Hou Yi is having the second-worst time of his life. His wife leaving will always take the first place.
This Hou Yi has a weird enmity with the golden sun crows. He destroyed their tribe's ancestors leaving the only one which is a one-way ticket to the irreplaceable hate to the Golden sun crows.
They hate him like no other and Hou Yi who liked to brag and act pompous always showed an intense amount of disdain to the golden sun crows and their tribe. That is because they didn't take revenge against him.
But from what Yanwu said, it is an order or more like the agreement between the tenth ancestor and King Yao who ordered Hou Yi to deal with the problem of the ten suns.