I just found out about this new book on local languages in China. Judging from the abstract and table of contents, it looks very interesting and promising: Signifying the Local: Media Productions Rendered in Local Languages in Mainland China in the New Millennium. The publisher's blurb:
In Signifying the Local, Jin Liu examines contemporary cultural productions rendered in local languages and dialects (fangyan) in the fields of television, cinema, music, and literature in Mainland China. This ground-breaking interdisciplinary research provides an account of the ways in which local-language media have become a platform for the articulation of multivocal, complex, and marginal identities in post-socialist China. Viewed from the uniquely revealing perspective of local languages, the mediascape of China is no longer reducible to a unified, homogeneous, and coherent national culture, and thus renders any monolithic account of the Chinese language, Chineseness, and China impossible.