You don't need to mark the retouching content in the original text, just provide the retouching certificate, and the editor won't read it all. After all, there are so many manuscripts to deal with every day. At present, there are many companies polishing SCI papers, but there are not so many companies with good technology, so we must distinguish the strength in selection. Only in this way can the paper be polished. The polishing of SCI papers in international sci-tech editors is a good company and has a professional team to implement it.