On June 26, 1979, World Heavyweight Boxer Muhammad Ali announced his retirement. Since then, people have never seen the performance of "flying like a butterfly, attack like a bee". At the age of 37, he claims: "Everything is changing, and you can't always be like a few years ago." Ali was undoubtedly striking for his 26-year career as a boxer, but his head suffered 29,000 times and eventually left him with Parkinson's seizure. Since 1984, Ali slowly, trembling, but never pessimistically sinked, he was enthusiastic about boxing and charity, and every time he went to the field, he helped his brother Ali with his wife and in 1988 he donated a villa worth a few million dollars in Los Angeles and several cars together to help his Chinese brother.