Why do the three of them have eye marks on their backs in the finale of Ghost Blowing the Lamp: The Ancient City? Looking for a solution?

It is a curse. Slowly the blood will turn yellow and finally solidify. Later, in order to break the curse, they embarked on a new adventure. The reason is that anyone who sees the ghost cave in Jingjue Ancient City will be cursed by the ghost cave (the scientific explanation is some kind of virus in the imaginary space). There are eye patterns on the back, including the professor, which is not mentioned on TV but explained in the book.

Extended information:

As explained in the original text, everyone walked to the west under the leadership of An Liman, hoping that the oil fields there could save everyone. The staggering crowd walked for a few days and almost collapsed. Even Fatty Wang, who was always full of energy, couldn't hold on and fell to the ground.

The scorching sun scorched the golden desert. Hu Bayi and his group collapsed on the ground to rest. Shirley Yang collapsed next to Hu Bayi and said guiltily. After all, he still brought trouble to everyone.

It turns out that she is a member of the Zagrama tribe. Their ancestors were cursed to pry into the secrets of the ghost cave. All descendants will not live to be fifty years old, and the reason why she tried every means to find the spirit is The purpose of Juegu City is to break this curse and save himself and his mother.

After saying that, Shirley Yang slowly untied the white gauze scarf around her neck and took off her clothes. Hu Bayi saw that there was a mark with a red eye pattern on her back shoulder. Shirley Yang said that was the cursed mark of the Zagrama tribe.

Baidu Encyclopedia-The ancient city where ghosts blow out lanterns