Waltz is a typical three-step dance, which can be understood as slow three;

Slow four steps is really slow, and people who don't have some basic skills may be old-fashioned if they jump slow four steps;

The fourth step belongs to the medium speed, which is more leisurely. The speed is similar to that of tango, but the momentum and feeling are far from it.

Four steps faster, so fast, so fast, people who haven't practiced can only fall or step on their feet.