Calling the deal a "strategic investment", KongZhong says it's spent RMB 100 million (around $16.5 million) for the minority interest.
The two companies will now seek to generate co-development, co-marketing and co-distribution synergies through their smartphone and PC game businesses.
In particular, OurPalm will use the investment to further push its cross-platform PC-mobile card and board games.
Both companies featured on the PocketGamer.biz top 30 Chinese developers of 2014, with the somewhat troubled KongZhong ranked at #29, while OurPalm was ranked #9.
It had its own M&A spree in 2013, buying developer Playcrab (aka Air&Mud), and majority stakes in Shang Game and Dovo.