Firebrand Though Cheng was able to complete the full set of prehistoric pottery reproductions requested by the museum, and at a level of quality that received high grades from the museum and from consultant Liu I-chang, Cheng himself still feels there are things that he could have done better.
儘管鄭永國在有限的時間裡，成功地復原出鶯歌陶瓷博物館指定的全部史前陶作品，也得到了館方與顧問劉益昌的高度肯定，但是，他仍自覺有不盡完美之處。