I don't think there's any contradiction between the two statements. Y Combinator stops their involvement in YC China, turning it into a separate entity. YC China gets renamed MiraclePlus.
The announcement by YC emphasizes the separation from YC China, the announcement by MiraclePlus emphasizes the continuity with YC China.
LOL: even the website ycchina.co redirects to MiraclePlus. http://www.ycchina.com/
[1] https://mp.weixin.qq.com/s/SnSsli_ZGo0yI58YD-ddaw