© Chen Haiwen

China may be a single-party nation, and the Hans may be the cradle of her population, but she is also home to 56 ethnic groups, a land of concealed diversity.

Chen Haiwen, 54, and 14 other photographers embarked on a project to document this in 2009, and a book “Harmonious China – Features of China’s 56 Ethnic Groups” was published as the result. Follow the jump to see snapshots of the book, which is now available on the iTunes App Store as a $1.99 iPhone App — China 56 Ethnic HD.

One year in making, the book was compiled from over 57,000 captures by the traveling 15-crew production team.

(via Adi Harsono)