Midi Music Park, Taihu Lake Midi Music Park

Located about 80km from Shanghai, Camp MIDI Taihu is the location of the 2015 MIDI Taihu Festival (May 1–3) and the 2015 MIDI Electronic Festival (May 15–17). It's in Suzhou, so getting there will require either a trip to the Suzhou rail station, a bus from Shanghai, or a private car / cab.

http://www.midifestival.com/template/t_index/index.aspx?nodeid=1036

https://www.ticketflap.com/taihulakemidimusicpark