The near infrared-labeled anti-CEACAM6 probe (CEACAM6 -mAb-IRDye800CW) was synthesized to study the tracking role of the anti-CEACAM6 probe in GC in vivo, the chemical molecular structure model diagram of CEACAM6 -mAb-IRDye800CW was showed in Figure 5D. The gene discussed is CEACAM6; the disease is gastric cancer.