Untolddead
CN and EN are quite different in their sizes. With the average EN that you mentioned you are describing a normal book. But CN or the stories they represent are far longer, maybe between 500-2000 chapters (!), so with average of 1500 words per chapter maybe a CN has between 750K - 3M words.
Well, I have taken 1,5k words as average but it can be higher, sometimes CN have more than 2K chapters as well. The thing is that a lot of authors are maybe used more to CN and therefore create stories that are built up longer and more different than what one is usually used to. In think. Maybe.