ACTA1 and Hepatic fibrosis: The Hematoxylin–eosin (HE) staining, MASSON trichrome staining, and α‐SMA staining results displayed that treatment with EXOs led to a significant reduction of the liver fibrotic area in mice with 6‐week and 9‐week CCL4‐induced liver fibrosis (Figure 5a–c).