According to Shana, the city of Koros is not so easy to enter. This requires not only the old Zhu and their attack on the Naga from the outside, but also the army in the city to take over. When the old Zhu and their encirclement of the Naga open a gap, open the gate and put them in.

it's necessary to inform the army of Koros. It's better to be able to contact the king of ISTE. Only in this way can the army in the city dare to open the gate at the risk of being rushed in by the Naga.

but in this way, it means that...