Another paper I’ve come across in my Web surfing: Ideen zur Sprachreform in China ab den ersten phonetischen Transkribtionssystemen unter besonderer Berücksichtigung des Schriftstellers Lu Xun (”Thoughts on language reform in China, starting from the first phonetic transcription and with special consideration of the writer Lu Xun”).

I don’t read German, so I can’t vouch for the correctness of the paper. Actually, from what little I can read, it seems that the author has a few all-too-common notions about “dialects”, etc. But the paper might be worthwhile anyway.