It looks like China may be a loser in this military coup.
According to
, the myanmar military has more reservations about China's influence and projects then the political leaders.
Lets see if there are "mah democracy" fingerprints in this coup. No noise from USA yet.
The USA has condemned the coup and demanded politicians be released. You might have been a little too hot off the button there.
Also, what's China's position? This is probably a good opportunity for Beijing. It's unlikely the generals would have done this if they'd thought the net result would be diplomatic and economic isolation. They're probably counting on the Chinese government turning a blind eye after a couple of months to let things get back to normal on the trade front.
If China makes it clear that they won't work with another junta and might even sanction members of the army, it would bolster China's image as the key power in the region if they're forced to back down, as well as further boost relations with the civilian government. Alternatively Xi could reach out to Biden and pledge to work together, which could get concessions from Washington.
As for why the coup happened, I haven't seen any evidence that this was sponsored by another country. The military were always unhappy about losing the last election because they'd stacked the system so much in their favour they couldn't believe it was possible for Aung San Suu Kyi to win. With her winning another election my guess is that they were concerned she'd start pushing for a new constitution to have proper civilian control of the country. The generals are also incredibly corrupt and are equally worried about being investigated after they retire and being thrown under a bus by their officer juniors. Winning the election would have protected the generals from further action, either by passing new legislation giving them immunity or just ordering prosecutors not to investigate.