Someone spit on the air-filled floor of my room.

Sometimes people are humiliated by their kindness. Many uneducated people don't need to get angry and retaliate. It is useless to be a quality and kind-hearted person. It is suggested to stick a sign or a piece of paper on the ground. If you find your neighbor more than once, you can talk to him directly. If your neighbor doesn't mean it, he will correct it. If he is interested, he will find a property or make his evil deeds public. Sometimes a weakness can be the next shame.