This is btw from Chengfa's website news section
It says actually the first flight was on October 29th and that all the test flighting work was done by December. During the test flight, the engine was reliable and performance numbers for tests matched the designed requirements. Didn't see the part about batch production though.
More from Chengfa
Design certification of the "HuangLong" (yellow dragon) engine.
From 2008
本报讯(特约记者付明耀 通讯员文广)4月19日至20日,正值一航涡轮院发动机研发攻坚决胜之际,中国一航总经理林左鸣到该院检查指导工作。
林左鸣在观看了展示该院自主创新研制发动机历程的专题介绍后,欣然提笔为四型在研发动机题写名称,走笔之下 ,“青城”、“黄龙”、“岷江”、“岷山”四幅大字跃然纸上。
这四型发动机,是该院利用多年技术积累,通过集成创新自主研发而成的,具有广泛的用途和良好的市场前景。
林左鸣对“青城”500、“黄龙”200通过核心机验证表示衷心祝贺,同时要求要千方百计加快研制进度,并抓紧“岷江”、“岷山”发动机的研制。他强调, 能够往前抢就往前抢,过去是定下了时间往往后拖,基本没有提前的,希望你们争口气,往前赶。对于市场,早一天与晚一天大不一样。
Sounds like Yellow Dragon is a 200 kg class engine. So, probably for missiles.
Looks like Chengfa is involved of CJ-1000AX project, producing parts for it. It talks about a series of technical exchanges in 2015, so looks like we are quite a way off still.