If there is an old man at home, and there is dementia at ordinary times, you need to accompany the old man to talk more, so that you can take good care of him to prevent loss.
If possible, we can have a nanny at home, accompany the elderly, take care of the elderly, and prevent the elderly from losing.
You can hang a business card around the neck of the old man, and write down the address or contact number, which is convenient for lost time and recovery.
Can be attached to the dementia of the elderly locator, so that you can always know the whereabouts of the elderly, so as to avoid loss.
If the old man is really lost, you can post the notice of looking for someone, and call on the caring people of the society to help find them together.
It's helpful to call the police in time to find the elderly. After all, the police are connected to the Internet and search together, with a higher probability.