I used to use another editing company outside of China for the past ten years. However, I found more and more details of my manuscript were ignored by its editors, and sometimes even important content was missing. Finally I submitted one of my manuscripts to both Edanz and the other company to find out if my English expression was not clear for native speakers. The editing results surprised me: they were totally different. After editing by Edanz my manuscript was simple and clear without losing any necessary details; I can see from the edited manuscript that the editor reviewed my paper thoroughly and edited carefully. I'm really satisfied with the editing work done by Edanz, which contributed a lot to my submission.