China also has an army of Spies embedded throughout the world where anything they want to know , being researched or devised, they know about it before it becomes public knowledge.
China’s been stealing information for decades....and they will continue doing so...and that includes human capital.
For you youngsters, Chinese scientists in the 1950 were often caught with suitcases full of Top Secret documents from projects they were working on. Many were thought to be anti-communist refugees from the Mainland or had fled to Taiwan.
Some, however, either were secretly communists, sympathetic to the New communist government in Peking, or threatened with some kind of harm, most likely to their families who remained in Red China.
Don’t know how much has been written on this, or even if there were serious congressional hearings in the 50’s, but it is something that needs to be openly discussed Now!