"It is better to be on hand with ten men than absent with ten thousand" -- Timur
The SP-9 truck-mounted 120mm gun/mortar concept was first revived at the 2016 Zhuhai Air Show. Back then it was mounted on a Dongfeng EQ2025 4x4 flatbed chassis targeting for export. According to Norinco, it can adjusted to firing rounds from either Russian or NATO, tailoring to customer's requirements.
The recently spotted domestic example is on a larger 6x6 Dongfeng allowing a greater structure support. It is in a similar arrangement as the Russian Zauralets-D of the same caliber.
Here is the export variant on display at the 2016 Zhuhai Air Show