Aged between 65 and 87, they come from Shanghai and they have been performing together every night since 1980. Each of the musicians has been playing jazz since the 1940's. They have seen off the Japanese occupation, the Nationalists, not to mention the Communists and their Cultural Revolution. Then came the opening up of Chinese society and, finally, turbo capitalism - Chinese style. And throughout it all, the band played on. Jazz stands for individuality, creativity and spontaneity, in a way that no other musical style does. In China these qualities were regarded with suspicion for many years. Against all odds, these legendary jazz granddaddies never lost their love of music. They kept it alive and it, in turn, kept them alive.

But one big challenge remains. This film follows the band as they leave China to win the hearts of the audience at the world's biggest indoor jazz festival, the North Sea Jazz Festival in Rotterdam…


http://www.kickstarter.com/projects/...-old-jazz-band

I don't know... could be at least according to Guinness Book of World Records
The trailer is good, but the promo for kickstarter gets a bit mouthy about the filmmakers. Fortunately you can click through to the trailer