The rapid rise of cheap one-way attack drones was made possible by a complex global supply chain that keeps leading back to China.

© Vladyslav Musiienko/REUTERS

Gao Zhen was convicted on charges of insulting Chinese heroes in works from early 2000s.

© Zhao Yaliang via AP

The annual events drew large crowds before Beijing cemented its grip and outlawed dissent.

© Kin Cheung/AP