A thousand years ago a very wise Chinese man wrote a poem about the moon. When I was travelling through Scandinavia and the Balkans in the middle of 2015, I decided to teach the people I met to sing the song in Mandarin. Almost all of them knew not a single word of Mandarin. So here it is, shot in 6 countries, featuring some of my favourite people of 25 different nationalities singing in the same language, under the same moon.