(a) The dead-live image of cells cultured on the CCP, GelMA-HAMA hydrogel and NdFeB-GelMA-HAMA hydrogel for 1, 3, and 7 days. (b) The phalloidin staining of cells cultured on the CCP, GelMA-HAMA hydrogel and NdFeB-GelMA-HAMA hydrogel for 1, 3, and 7 days. Scale bar, 100 μm.