When We Are Allowed To Hit Someone?

As self defense practitioner, there are 4 situations where we are allowed to hit someone:

1. When someone trying to attack us or touching our body.

2. When someone trying to touching, stealing or sabotage our private belongings.

3. When someone trespassing our private area without permission.

4. When someone being attacked and need our help (good person only, we never help bad person).