How the AP uncovered US big tech's role in China's digital police state

BEIJING (AP) — Over the past quarter century, American tech companies to a large degree designed and built China’s surveillance state, playing a far greater role in enabling human rights abuses than previously known, the Associated Press has found .

AP journalists spoke to more than 100 sources, scoured tens of thousands of documents, and obtained several major leaks of internal and classified material, the existence of which is being reported here for the first time.