Chinese hackers managed to steal thousands of documents related to the design and production of both the F-35 and the B-2 in 2007 from Lockheed Martin, according to documentsleaked by former National Security Agency contractor Edward Snowden that were released in 2015.
https://taskandpurpose.com/military-tech/china-h-20-stealth-bomber
Coincident? Or part of the sell out?
China's Xian H-20 stealth bomber completes nuclear triad, could make debut this year
https://www.foxnews.com/world/chinas-xian-h-20-stealth-bomber-completes-nuclear-triad-could-make-debut-this-year