This was already preluded late on Friday via China premier Li Keqiang's remarks here.
The latest cut here would be the first since July, in which the PBOC unveiled a broad-based cut to reserve ratios at the time. Since then, they have staved off from further policy easing despite downside pressure to the economy but the latest move here may be a bit of fine tuning before we get to the Lunar New Year holiday next year.