Preface: The principle of boxing, the art of toughness. There are skills in numbers, and there are numbers in skills. Boxers, with the power of both fists, strike out a piece of sky for the strong...…………………… The strong, It is not necessary to defeat everyone to prove that he is a strong man. As long as he will not let those around him who care about him worry about him and shed tears for him, it is enough...