Yah, I had to read elsewhere to figure out what happened. It's basically an account of what his actions were that led to his exile. A lot of the After has been written about elsewhere, except the parts related to the central government's behind the scenes actions.

After that evening, the hubbub died down. In the coming months, he talked politics with some students, some of whom eventually became leaders of the Tienanmen Square protests. He was never a planner, never a protester, nada. However, when he saw that the Chinese Government started cracking down hard, he realized he was going to be scapegoated for his essays a few months prior, and went into the US embassy. He had been declared the most wanted person even though he had little to do with the actual protests.

Looks like it's an excerpt from a book