Rumors that China might be using this scaled down CZ-10 1st stage for a grasshopper style test hop. Maybe. We do know for sure that a CZ-10 low altitude flight test is due for this year, makes sense to do a hop and maybe even test out the wire catch system.

Also, looking at the full video of the CZ-10 static fire, they're clearly rushing, the launch pad is still clearly under construction. Which gives credit to rumors that the launchpad construction has been heavily delayed and the CZ-10 program in general is also facing delays. China might need to rush the CZ-10 hard if they want to meet the 2030 lunar landing target. It's clearly the bottleneck here. The Mengzhou and Lanyue look like they're going well, but there's no way for them to be tested in their expected orbital conditions without the CZ-10.