This poem laments the difficulty of making friends. The whole poem can be divided into three paragraphs. The first four sentences are the first paragraph. The first two sentences are compared with each other, which means to be cautious in making friends; In three or four sentences, list examples of noble and humble friends from the front. The fourth sentence is the second paragraph, which lists the examples of the opposite brothers. The last ten sentences are arguments, which directly express the poet's view that it is not easy to make friends. Brothers are still like passers-by, and the emotional barrier between people should be high mountains and deep seas. "Speak softly" means not to trust your friends easily. "Flowers bloom early, peaches and plums are not loose", that is to say, promises are light, promises are broken, and abuse is heavy. This is the visualization of two sentences. The last two sentences call for the reappearance of the ancient style of making friends. The discussion part is introduced step by step, orderly, and virtual and real.