When the physical skill reaches level 20, it can be regarded as entering the threshold of a martial artist.

If you don't reach level 20, you are called a martial artist in the world of martial artists.

Twenty to twenty-five levels, known as samurai;

Twenty-six to thirty ranks, known as military generals;

Thirty to forty, known as the Martial King;

Above level 40, that is, the legendary general existence zài, is respected as Wuzun.

If you practice physical skills to level five, you will have internal strength, but only when you reach level fifteen and level ten in mental power, you can practice dark energy.

Bright energy and dark energy are collectively referred to as internal strength.