Why is the "X" symbol of ancient seals very similar to the Western Red Cross symbol?

There are seals in China and the West. It is mentioned in the Bible that the seal made of parchment is used to seal some taboo places in religion to warn the world not to violate it at will. It can be seen that the western red X is related to religion, and the cross symbolizes the western cross.

In China's Huai Nan Zi, there is a record that Zhenshan was sealed to keep the world peaceful. Of course, most of these records are mythical or religious. In the ancient world, the use of cross seals with strong majesty played a taboo role.