Where can the elderly get a health certificate by plane?

Provisions for the elderly to fly: As long as the family members think that the elderly are in good health, they can arrange for the elderly to board the plane, but the elderly must show the health certificate issued by the hospital before boarding the plane. Passengers over the age of 70 must provide a valid physical examination report issued by the hospital within half a year when purchasing tickets or a health certificate issued by a medical unit at or above the county level within 96 hours before the flight departure when purchasing tickets, and they are in good health and do not need special care.