Ok pretty sure this is China's response
This is just one small step away from a full blockade.
This is announcing a blockade lite, if they choose to do so, whenever China Coast Guard wants to.
So what are people's opinions, when or if, China decides to randomly inspect a vessel in the Taiwan Strait, once in a while?
Will the United States Navy get involved?
My belief is no, the Americans will not get involved.
Two reasons.
1) China already laid the bait with Marcos Jr, and they wanted no part in escalating that.
2) The most important Taiwan ports kind of face the mainland, and the Taiwan ports on the east of the island are kind of small. Close the Taiwan Strait to transit, that will basically close the ports. If the Americans show up inside the strait, they would actually would be in artillery range, lol. Set up a closing of both ends of the strait, that would be creating the kill zone for any intruder or hostile actor, should be liquidated, as the Russians like to say. Closing both ends of the strait, and blockading that single northern port, that is almost a total blockade. Those two ports on the east not big enough.
It will not take much to get right there for this.