An 80-year-old man can definitely buy a house, because he is also a citizen of China and has the right to buy a house. But he can only pay in full or in installments, and then pay the house in full. An 80-year-old man can't make a mortgage.
80-year-old people can also settle down with their children, which is a new policy for the elderly being implemented in many parts of the country. It was learned from the household administration department of Haikou Public Security Bureau that the policy of the elderly settling with their children is more humanized in Haikou, and as long as they reach retirement age, they are not subject to household registration restrictions.