Focused on the episode of Chejia in Naoxihe which should only contain two vocal tunes: Pinban and Jinban without dramatic changes, while there are indeed varied singing features given the fact that taught by different masters. Considering that, it is worthy of heritage preservation. Seen in this light, the reason why Chejia has been popular in Beiguan performances is not because of their style of singing, but the preamble performances. Based on this reason, the paper not only discusses the accompaniment style in the performance, but also the relationship between actors'' posture in preamble performance and the music. In the end part, the paper also introduces the costume of traditional drama Beiguan, which is still less concerned, especially under the current circumstance for stage performance that the costume of Beiguan is gradually replaced by Peking opera and Utako drama. But in fact, traditional costume is quite worthy of recording.

In addition to introduction and conclusion, the paper has three chapters. The first chapter has a general text description to Chejia by comparing Beiguan and Gui opera.

The second chapter analyzes the reason of singing difference succeeded from different masters and the coordination of musicians; for preamble performance, the walking styles and physical actions are described. The third chapter records the stage costumes of Chejia, illustrating the costumes, props and makeup of the two protagonists.