There was a ninety-minute program on BBC TV last night in the 'Imagine' series (which previously featured Benjamin Grosvenor et al): 'Imagine.....Do or Die: Lang Lang's Story', where the cameras followed Lang Lang and his parents and agent around in China, USA, Germany, UK etc plus extensive frank interviews with his parents (including the infamous 'go commit suicide' episode) as well as Gary Graffman, Christoph Eschenbach, Daniel Barenboim, Vanessa Latarche and Bryce Morrison, not to mention inspirational people (and animals) in Lang Lang's childhood like Horowitz and Tom & Jerry
. And video clips of Lang Lang in various competitions and practising at home as a child, all very illuminating about how and why a teenager from China became a mega superstar yet only plays classical music. It also shows, contrary to many people's beliefs, that Lang Lang's mannerisms were already there from the age of 12 when he played Chopin's F minor Concerto in a competition in Japan.
I don't know whether people outside the UK can access this program but try on the BBC website iPlayer.