CD274 and neoplasm: In the in vivo experiment of female C57BL/6 mice inoculated with Hepa1‐6, it was found that the treatment with such composite sonosensitizers (TiO2‐Ce6‐CpG) combination with PD‐L1 inhibitor could not only effectively inhibit the primary tumor but also significantly delay the growth of distant tumors (Figure 7d).