Trade changes Indo-Chinese relations

India is preparing to welcome China's Prime Minister Wen Jiabao, who arrives in Delhi on Tuesday.

Historically, the China-India relationship has not been an easy one - they have fought a war, China has long been close to Pakistan, and the Dalai Lama has made his home in India.

However, rapidly growing trade ties are changing the dynamic - something very much in evidence in the eastern Indian city of Calcutta.

Chris Morris reports.