Hi! It depends on the what you are trying to say, in day to day life I would often use both expressions. Although I would make a slight revision, and change both to: 1. People on a low income 2. People with a low income It just slightly more natural to me! :)

I’m going to Sanya in December. Sanya is a beautiful city and it near the sea . There are lots of coconut trees on the street and beautiful sceneries. I am going to walk on the beach in the evening when I come to Sanya. I want to invite my friends to have dinner at Italian restaurant, because I haven’t met for a long time. I miss him very much. In addition I want to invite my teacher to have dinner as well , because he help me a lot. Sanya is my favorite city except my hometown. I'm going to Sanya in December. It is a beautiful city, near to the sea. There are a lot of coconut trees on the street and beautiful sceneries. When I arrive I'm going to walk on the beach in the evening. I want to invite my friends to have dinner at an Italian restaurant, because I haven't met them for a long time. I miss them very much. In addition, I want to invite my teacher to have dinner as well, because he helps me a lot. Sanya is my favorite city apart from my hometown.

A good teacher is a person who afford spread his knowledge to other people and can influence peoples A good teacher is a person who is able to spread his knowledge to other people and can influence others.