The goal of this clinical trial is to test the impact of virtual reality on rehabilitation for the patients after a major amputation. The main questions it aims to answer are: * Does the virtual-reality-assisted rehabilitation improve the life quality of patients (i.e. lesser pain, better spirit)? * Does the virtual-reality-assisted rehabilitation improve the daily life function of the patients? Participants will received a virtual-reality-assisted rehabilitation on the second postoperative day for ten days. The rehabilitation would be carried out two times per day and 30 minutes per training.
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Barthel Index
Timeframe: single time point (1 day)
The Morton Mobility Index (DEMMI)
Timeframe: single time point (1 day)
Esslinger Transfer Scale
Timeframe: single time point (1 day)