If Shakespeare were alive today, he might be writing on Twitter.

I also doubt a man can give really clear reasons for anything.

Choices after waking up: To be true or to lie? To take action or be brainwashed? To be free or be jailed?

China and the U.S. are two societies with very different attitudes towards opinion and criticism. In China, I am constantly under surveillance. Even my slightest, most innocuous move can - and often is - censored by Chinese authorities.

I think optimism is whether you are still exhilarated by life, whether you are curious, whether you still believe there is possibility.

The rest of the world understands little about China's changes and the possibilities and crises that come with them.

Once you've tasted freedom, it stays in your heart...