Self-portrait. [Photo/© John Maloof Collection, courtesy Howard Greenberg Gallery, NY, and diChroma Photography]

A Hidden Genius: Finding Vivian Maier reveals a corner of the private, mystic life of Vivian Maier whose gift in photography was only discovered after her death. [Photo provided to China Daily]

A Hidden Genius: Finding Vivian Maier reveals a corner of the private, mystic life of Vivian Maier whose gift in photography was only discovered after her death. [Photo provided to China Daily]

Chicago, 1960s. [Photo/© John Maloof Collection, courtesy Howard Greenberg Gallery, NY, and diChroma Photography]

Chicago, around 1974. [Photo/© John Maloof Collection, courtesy Howard Greenberg Gallery, NY, and diChroma Photography]

New York, 1954. [Photo/© John Maloof Collection, courtesy Howard Greenberg Gallery, NY, and diChroma Photography]

NYC, New York, Oct 18, 1953. [Photo/© John Maloof Collection, courtesy Howard Greenberg Gallery, NY, and diChroma Photography]

Self-Portrait, 1953. [Photo/© John Maloof Collection, courtesy Howard Greenberg Gallery, NY, and diChroma Photography]