ICAM1 and neoplasm: For this purpose, we covalently coupled ICAM‐1 mAbs with Cy5.5 (ICAM‐1–Cy5.5) (Figures S6–S8, Supporting Information) and then intravenously injected ICAM‐1–Cy5.5 into 4T1 tumor‐bearing mice at a dosage of 5 mg kg−1.