There are at least some that are novella lenght like "the jade pavillon".
And I was asking for advice not referring to any specific story. I'm currently writing what would qualify as a novella. I'm on page 50 right now and if I ever get it finished it will be well over a hundred pages. You can't do with just one 'main' character in a piece that long. In addition, the characters will not all be present in every chapter. You have to make the reader remember them so he will know them when they reappear.
Satan_Klaus