I heard that my female classmate was moving to the dormitory, so I offered to help her with her luggage. After moving, I told her the reason for refusing. She also gave me 200 red envelopes.

You offered to help her with her luggage. That's voluntary, not because she asked you. Her refusal only means that she doesn't like you. If she doesn't like you, she will definitely refuse. Even if she doesn't like you because you helped her, can she agree? And give you 200 red envelopes. She wants you to know more about your relationship. She doesn't want to feel indebted to you. You helped her and she gave it back to you. So don't give up hope. You will meet your happiness.