Background: The study, titled “Clinical Value of Serum FABP4, CXCL12 and Inflammatory Factors in Patients with Acute Exacerbation of Chronic Obstructive Pulmonary Disease”, aims to investigate the potential role of fatty acid binding protein 4 (FABP4), inflammatory chemokine CXCL12, and various inflammatory factors in the acute exacerbation of chronic obstructive pulmonary disease (AECOPD). This evidence concerns the gene FABP4 and chronic obstructive pulmonary disease.