> Even supplies for which there simply can't be a medical certification are stalling at customs.
I don't think there is way more ongoing. That's just how things work in China and CCP's distinct way of being incompetent. CCP is known for its intolerance of critics, especially when covered by international news firm. They try their best to avoid it, not considering anything else. When someone in country create buzz, they censor it, sometimes arrest the author. When someone they can't arrest does it, they suppress what they can to "avoid the problem". This is politic and weighted more than anything else. A lot of party members still don't recognize free market and a strong private side as being important, especially Xi. After all they are communist.
In this case, the problem was seen as "some shady businessmen exporting unreliable masks for their own profit and got caught, it harms our 'global image'". So they took them down, switched to assuming everything coming from private side are garbage unless you can prove otherwise.
OTOH, government-ran Red Cross have zero problems because they are "trusted and endorsed".