As shown in Figure 5i, the miR-344a-5p mimic rescued the function of lnc-PCF in lung fibrosis and the expression of E-cadherin expression, which was inhibited by lnc-PCF overexpression, and reduced the expression of α-SMA, vimentin, and Snail, which were promoted by lnc-PCF overexpression. The gene discussed is CDH1; the disease is pulmonary fibrosis.