I am a student in Qingyuan. I want to ask: "If the teacher takes us to work (summer job), does he have the right to receive our salary?"

It depends on the way your teacher takes you:

The first is that your teacher will let you work with your employer after he invites you. You and your teacher have a direct employment relationship (your teacher is also a so-called contractor), which should be understood as your teacher pays you a salary instead of collecting it.

Second, if your teacher introduces you to work with your employer, your teacher will act as a middleman. Your teacher has no right to collect your salary unless you negotiate with your employer in advance and then collect it for you.