Its officially confirmed. "Hong Lei, spokesperson for China’s foreign ministry, said the Chinese government has already expressed its serious concern to the Myanmar side, demanding they get to the bottom of what happened and take effective measures to prevent similar incidents from happening again during a press conference held on March 3."
Its confirmed officially anything that happens aren't stories, you never even tried to read the whole news where it states "Hong Lei, spokesperson for China’s foreign ministry, said the Chinese government has already expressed its serious concern to the Myanmar side, demanding they get to the bottom of what happened and take effective measures to prevent similar incidents from happening again during a press conference held on March 3."
I guess China doesn't have much mapping in that area.