Four years ago, Chinese President Xi Jinping at the United Nations Office in Geneva offered China's solutions to global challenges: build a community of shared future for mankind.

What actions should be taken?

Here are some answers from Xi's keynote speech titled "Work Together to Build a Community of Shared Future for Mankind" on January 18, 2017:

(Produced by Huang Jingjing, Bao Han and Wang Yufeng)