We can all agree that no one knows just what the hell is it, the FT article is all over the place...
There is a possibility that the FM spokesmen was not trolling when he said it was a reusable spacecraft test, remember that video about TengYun launch system where they tests vehicle separation in hypersonic air-flow?
Honestly I don't think China's FM spokesman was trolling anyone here, trolling as in lying. China has a good idea how much the US knows given China knows exactly where every AEGIS boat and American asset flying in the air near the SCS, and satellites orbiting in space were at at those moments during the test.
There is little point for China's FM to troll in this matter and to invite the US to present information that contradict what the FM is officially stating on record. Simply because it is easier to say nothing if that is the case.
I think China's FM's statements were there to downplay the military capabilities of the technology and confirm some things to the US. It is a single message with two meanings, intended for two different groups - the ignorant masses and international community, the US military. The payload was fired into the SCS. The FM said it is for transportation. Transporting nukes and KKVs for anti-shipping are both forms of transportation. The message to the international community was that the test is nothing special. The message to the US military is that the platform may be a "transporter" but one that can deliver payloads at Mach x, into things on the SCS, so please do not tread lightly into any conflict.