CEACAM5 and neoplasm: In the mice that were intravenously injected with CEA‐positive HT‐29‐RFP, AsPC‐1‐RFP or MGC803‐RFP cells and thereafter injected with CEA‐CAR‐T cells in combination with rhIL‐12 at day 7, the in vivo tumor generating fluorescence signal significantly decreased at 21 and almost disappeared at day 28.