Rights to ‘Man in Black,” one of two documentary films by China’s Wang Bing to appear in Official Selection at Cannes this year, have been picked up by specialty sales agency Asian Shadows.

The 60-minute film, which will debut as a special screening, is a portrait of 86-year-old Wang Xilin, one of China’s most important modern classical composers and is now lives in exile in Germany. It was made in close collaboration with French cinematographer Caroline Champetier, whose credits include Leos Carax’s “Holy Motors,” Amos Gitai’s “Promised Land” and Andre Techine’s “Alice and Martin.”

During the 1960s, when China’s Cultural Revolution forced intellectuals into the fields and stripped the middle classes of their wealth, Wang Xilin was the was the target of severe persecution, including beatings, imprisonment and torture. The film examines the body and soul of a man scarred by a life of suffering,...