FOTOS DE MINEROS
http://photographyofchina.com/blog/interview-song-chao
http://lamiradafotografica.blogspot.com.es/2011/08/song-chao.html
https://www.all-about-photo.com/photographers/photographer.php?name=song-chao&id=595
http://www.slate.com/blogs/behold/2013/07/05/song_chao_portraits_of_workers_at_a_hydropower_manufacturing_facility_in.html