Of note, the emPAI % values of complement C3 and apolipoprotein C‐III were associated with the tumor progression and prognosis of HCC, as galectin‐3‐binding protein in CCA and 72 kDa inositol polyphosphate 5‐phosphatase in cHCC‐CCA. Here, APOC3 is linked to hepatocellular carcinoma.