According to Huitong, this latest signing could be the "optimized" "Z-10A" model under development and expected to enter the mass production soon.
The new Z-10A sports a redesigned nose, reduction in weight and powered by the upgraded WZ-9 turboshaft twin engine (notice the twin 90 degree upwarded engine exhaust port). The original twin Pratt & Whitney PT6C-76C turboshaft engine equipped Z-10 prototype is rumored to be underpowered.
The original Z-10 Prototype
The new Z-10A