Yu Feng, a junior student, got a job as a tutor in April. This was his first time to come into contact with tutoring. Although he only taught a primary school student Chinese, he still couldn't help but feel nervous. The place where the tutoring work is only about fifteen minutes away from the school. He found the home of the destination employer according to the address and lived on the fifth floor. When Yu Feng arrived at the door, his heartbeat was a little faster, not only because he went up to the five floors, but also because he had not yet figured out how to say hello to the other party. Wait for the door, is it the child's father or mother? Or the child himself? Different people should say hello in different ways, but what should I say? Hello, this is too ordinary. Perhaps as a Chinese tutor, you should have better negotiation words...