The stage name of Guan Qian’s Graduation Tofu Box can be chosen according to personal preferences and characteristics. Here are some stage names for reference:

1. Tofu Man: Taken from Tofu’s weakness and The combination of chivalrous spirit is suitable for people with humor and a strong sense of justice.

2. Box Monster: It means a person with a unique and eclectic personality, suitable for people with strong creativity and desire for expression.

3. Ganbi Walk: It is derived from the combination of "ganbi" and "walk", which means walking freely after graduation. It is suitable for those who value freedom and relaxation.

4. Guanqin Tofu: It means caring about relatives and the importance of family. It is suitable for people who value family and family ties.

5. Abbreviation of stage name: You can abbreviate it according to your name, hobbies, etc. For example, "GGB" stands for "Guan Gan Bi".

The above are only some stage names for reference. Specific choices need to be considered based on personal circumstances. The final stage name should be consistent with your own personality and artistic style, so that people can easily remember and associate it with you.