SUCO and neoplasm: Then they utilized polyaspartic acid (PASP) around BPNSs to adsorb BPNSs on the surface of Ch1 cells and formed type II heterojunctions between BPNSs and the chlorophyll of Ch1 cells, which was a structure that could thoroughly separate photo-excited electrons and holes for 1O2 generation and O2 evolution, thus improving the conversion efficiency of light energy, generating more reactive oxygen clusters to induce immunogenic death of tumor cells, and activating the immune system of the body to exert anti-tumor effects.