Do the elderly need a health certificate when flying?

Although the transport rules promulgated by the Civil Aviation Administration do not stipulate that the elderly need a "diagnosis certificate" from the hospital when they fly, some airlines say that 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, which is the default "regulation" of more airlines. According to Sanya Bay Family Hotel, airlines stipulate that passengers over 70 years old should provide a valid medical report issued by the hospital within six months when purchasing tickets (including cardiovascular and respiratory projects and other special care that needs to be provided), or show their air tickets and boarding passes that have been taken within six months, and they are allowed to carry them after being reviewed by the airlines. In order to prevent the delay of the trip, you must arrange a medical examination as soon as possible before booking a plane ticket for the elderly. In addition, Sanya Bay Family Hotel reminds everyone that airlines have different regulations for the elderly to fly. If some airlines do not carry elderly people over 80, they should consult in advance before booking tickets. If the elderly have a recent flight record, they should also keep their air tickets and boarding passes for next use.