Teahouse, as Lao She's masterpiece, has made many achievements in art, which embodies the style of Lao She's plays. First of all, the play profoundly reflects the social essence of old China and shows the inevitable trend of historical anti-war. However, we don't choose major social themes to describe China's major practices and important figures since the Reform Movement of 1898, but show them by "revealing some political news from the side" and the rise and fall of Yutai Teahouse. As the "window" of society, teahouse is a small society. Through its deterioration, it was finally swallowed up by darkness, which showed the historical fact that one era was not as good as the other, and revealed the historical law that the cannibal old society was bound to perish. Secondly, the drama breaks through the traditional dramatic techniques, instead of pursuing the coherence of the story and fierce conflicts, it adopts the "portrait exhibition structure" to complete the theme of the work through vivid characters' fate and ups and downs. The content, time, span and characters reflected in the play are rare in drama creation. Among the more than 70 characters in the whole play, as many as 50 have names. For so many characters, the screenwriter adopts the main characters from strong to old (such as Wang Lifa, etc. ), running through the whole drama; Minor figures come down in one continuous line (such as pockmarked Liu and Tang Tiezui); Each character tells his own story and combines it with the times; Irrelevant people can come and go at the drop of a hat. Moreover, even if all kinds of characters in the play only appear once, only a few lines have played an indispensable role in deepening the theme of the work. Thirdly, the works also reflect the national style of Lao She's plays, and give full play to the writer's familiarity with the old society and his proficiency in writing about the life of Beijing citizens, which has a strong "Beijing flavor". The characters in the play are all authentic Beijingers, and their personality characteristics, psychological state, spiritual temperament and language habits are the products of our nation in a specific era; The environment is a typical Beijing teahouse. The display and arrangement of the teahouse and the dialogue between the characters are all authentic Beijing flavor. In particular, the writer also integrated Quyi, a folk art, into his plays, which not only organically introduced the plot, but also solved the problem of long time span and increased the expressive force of our national art. Fourthly, although Teahouse is based on history, the author reflects the past based on today, so it contains a strong contrast between the old and the new society. The author wants people to cherish today's happiness and love our new society while seeing past sufferings. This is the same as Lao She's works reflecting real life after the founding of the People's Republic, and the starting point is still to praise the light of socialism.