CCTV on WS-15 Turbofan Assembly Line

Some people keep claiming WS-15 began bench testing on 2015, but according to this article, ground bench testing of the engine core was completed on 2005.

http://blog.sina.com.cn/s/blog_5387c42f0102xjuz.html

1.) 2000年, WS-15核心机开始研制。 "2000, WS-15 engine core start to develop."

2.) 2005年：WS-15核心机完成地面台架测试。"2005: WS-15 engine core completed ground bench testings"

3.) 2006年: WS-15发动机立项。"2006: WS-15 engine project was formally established."

4.) 2009年12月：WS-15核心机完成高空台测试。"December 2009: WS-15 engine core completed high altitude platform tests."

5.) 2011年：中航黎明完成WS-15验证机, 并提前交付。"2011: Liming Factory completed the WS-15 prototype, and was delivered ahead of schedule."

6.) 2012年底--2013年初：WS-15工程验证机通过高空台测试。"early 2013: WS-15 engineering prototype passed high altitude testings."

7.) 2014年：歼20第2011号进行WS-15单发试飞。"2014: J-20, number 2011, started testing with one WS-15 engine." (the other engine was probably the older version of WS-15)

8.) 2015年：歼20第2016号进行WS-15双发考核试飞；"2015: J-20, number 2016, with two WS-15 engines verification testings.

9.) 2016年：歼20第2101号生产型完成定型。"2016: J-20, number 2101, completed production model testings."

10.) 2016年底：歼20第2101号量产服役型奔赴珠海航展。"end of 2016: J-20, number 2101, production and service model, demonstrated at the Zhuhai China Airshow.

Notice, This article gave very specific dates and testing and develop timeline. The writer obviously got insider level informations.