“...accidental leak ...”
If it was leaked, I would question the words, “accidental leak.”
The Chinese Commies are a devious bunch who would do anything to pursue world domination. They have no regard for life as does the remainder of the world. I was in Korea in 52,53. Ask any Korean war combat veteran. The Chinese would deliberately expose their own troops to get our position, they attack en masse. The first throwing their bodies over the serpentine coils of wire and the second wave running over the bodies of their buddies, and on and on. They don’t think the way we do, they don’t believe as we do, they are different.
It's entirely possible that the original leak was accidental - and equally possible that once China realized how big a hit they were about to take economically, they took steps to make sure they didn't go down alone.