(1) Those who are allergic to pirfenidone, (2) The investigator judges that the subject's compliance is poor. (3) Patients with severe liver disease, (4) pregnant and lactating patients, (5) Those who have severe kidney disease or need dialysis treatment, (6) Those who need to take fluvoxamine at the same time

(1) Those who are allergic to pirfenidone, (2) The investigator judges that the subject's compliance is poor. (3) Patients with severe liver disease, (4) pregnant and lactating patients, (5) Those who have severe kidney disease or need dialysis treatment, (6) Those who need to take fluvoxamine at the same time