Beijing-bound Flight 1350 landed in Zhengzhou city at 10 a.m. due to an "illegal interference," the Zhengzhou city airport said on its account on the microblog Weibo.com.
According to the aviation authorities, by 13.17 local time the situation was settled. All passengers and crew are safe.
The Zhengzhou airport said in a statement that is activated emergency measures, and added that the passengers who disembarked from the Air China plane were in a stable mood.