As shown in Figure 3E, the 4T1 tumours on left side was transfected by lentivirus‐TLR5 knock‐down, 4T1 tumour on right side was transfected with negative control lentivirus and on the back one was lentivirus‐non‐treated 4T1 tumour. Here, TLR5 is linked to neoplasm.