Upgrade requires 8640+ Shenyi to upgrade feathers, and each click consumes 15 Shenyi to upgrade stones. I suggest you prepare more.

Advanced wing table:

It takes about 30 advanced Dan to upgrade from 0 to 1.

1 to 2 requires about 60 advanced Dan.

It takes about 90 advanced Dan to upgrade from 2 to 3.

It takes about 280 advanced Dan to upgrade from the third level to the fourth level.

It takes about 425 advanced Dan to upgrade from level 4 to level 5.

Upgrading from level 5 to level 6 probably requires 1290 advanced Dan.

Upgrading from 6 to 7 takes about 2280 advanced Dan.

It takes about 3600 advanced Dan to upgrade from 7 to 8.

Upgrading from 8 to 9 probably requires 5440 advanced Dan.

It takes about 8640 advanced Dan to upgrade from the 9th order to the 10 order.

From 1 1, it probably takes 1 3600 advanced Dan to raise the order.

The consumption of advanced Dan is different every time. Collecting more advanced Dan can improve the advanced level faster. If the player gets the best wings or wings with better quality, he can advance first, which has a great effect on the player's overall combat power bonus.