London calling and Beijing is answering

"Liang zhi lao hu, liang zhi lao hu, pao de kuai, pao de kuai (two tigers, two tigers, running fast, running fast)..." Azhar Choudhry chants trying hard to pronounce correctly.

The Chinese children's song, Two Tigers, is seldom sung these days, but for Choudhry and his young UK friends, the melody is easy to remember and became a theme song for their week-long exchange visit to China.

UK-China 400 is a project involving 400 young Chinese and Brits, who will journey back and forth between Beijing and London between now and 2010.