Checked OP from weibo and appraently the poster claims this is a early development test model from 601, specifically to test the flight control system. He also posted 3 lines with the picture that may be research paper titles or areas of development. They're as such (please excuse my limited English vocabulary):
基于L1自适应推力矢量型V/STOL飞行器增稳控制
stability control of V/STOL aircraft with L1 adaptive thrust vectoring
推力矢量型V/STOL飞行器动态过渡过程的操纵策略优化
Dynamic transition phase (AKA transition between hovering and level flight as I understand it) control strategy optimization of V/STOL aircraft with thrust vectoring
推力矢量型V/STOL飞行器短距降落控制策略设计
Short landing control strategy design of V/STOL aircraft with thrust vectoring
I can't vouch for the credibility of the person who posted these, but he's been a rather active individual when it comes to military topics, especially in areas concerning the navy and naval air forces, and indeed seems to have some information sources. The link is as follows:
Around early 2010s china send a group of engineers interviewing yakolev engineers about the possibility of reopening the production for yak141 vtol jet among people being interview including the test pilot ,the pilot provided the techical shortcoming particularly flight handling for yak 36 and yak 141,a chinese engineers believe the problem can sove by incorporating AI .
Few year latera small and blurr image of a vtol uav power by small jet appear.in the web,tyerecare rumor of vtol jet under devlop.some said it could be twin engine vtol.
Related?Getting off topic for a UAV thread now but I'll just chime in with one last opinion. I think in the near term there's no desperate need for China to develop too much VTOL capabilities, they are only really used in a naval setting where the main advantage of a VTOL is its ability to take off on a short runway (amphibious assault ships), freeing up the supercarriers to carry heavy fighters, most of China's potential conflict zone will be within land-based fighter range and they're not fighting half way across the world, so deck space is less of a concern compared to the US navy, it's a nice technology to have, but not strictly necessary for any of China's near term goals.
Got this picture from somewhere in this forum, which is allegedly uploaded on Weibo (or some other now-defunct China-based defense forum) sometime in 2015/2016.
No information on the source is available, and no updates has ever appeared ever since.