Richard Zhu, in plaid shirt, and Amat Cama, right, watch as they compete in the 2019 Pwn2Own contest with a zero-day exploit against the Microsoft Edge web browser. (Zero Day Initiative / Twitter)
Chinese contestants from major companies had been dominating the contest in recent years, but new regulations from Beijing prohibited them from joining this year's fray.
The report comes as White House cybersecurity czar Rob Joyce says he is reviewing the Vulnerability Equities Process — the policy structure that decides whether zero-days found…