On May 4, 1919, Beijing students took to the streets protesting against the then warlord-led government, which planned to sign a humiliating international pact.

The demonstration triggered widespread protests across the country. The movement also served as a campaign to fight against feudalism and promote democracy and science.

Rudd also recalled how former Australian Prime Minister Gough Whitlam's 1973 visit to China inspired his interest in the "extraordinary country" and the remarkable changes that have taken place in China over the past three decades.

"The scale and pace of China's economic development and social transformation are unprecedented in human history."

Talking about his maiden visit to China as prime minister, Rudd singled out climate change as an important part of his discussions with the Chinese leadership.

Climate change is not just one big future challenge for both countries, but also one key issue of the idea of a harmonious world because it is about harmony with nature, he said.

"It is important that China play an increasingly prominent role on climate change."

(China Daily April 10, 2008)