![](http://www.ecns.cn/hd/2019/10/11/ed3bb4c351a04efbb4b9448b1e82fbdc.jpg)
Three Zhi-20 (Z-20) helicopters participate in a demo flight during the 5th China Helicopter Exposition in north China's Tianjin, Oct. 10, 2019. A fleet of China's new self-developed Z-20 helicopters has made a demonstration flight at the ongoing helicopter expo in the city of Tianjin. (Xinhua/Li Ran)
![](http://www.ecns.cn/hd/2019/10/11/84b8d16dabd540d68931fa93613907e9.jpg)
Photo taken on Oct. 10, 2019 shows a Zhi-20 (Z-20) helicopter during the 5th China Helicopter Exposition in north China's Tianjin. A fleet of China's new self-developed Z-20 helicopters has made a demonstration flight at the ongoing helicopter expo in the city of Tianjin. (Xinhua/Li Ran)
![](http://www.ecns.cn/hd/2019/10/11/feb53006ad104b4f81e3f7c688745a1b.jpg)
Photo taken on Oct. 10, 2019 shows a Zhi-20 (Z-20) helicopter during the 5th China Helicopter Exposition in north China's Tianjin. A fleet of China's new self-developed Z-20 helicopters has made a demonstration flight at the ongoing helicopter expo in the city of Tianjin. (Xinhua/Li Ran)
![](http://www.ecns.cn/hd/2019/10/11/94583321c8fc496b9b3222e6dbc4779e.jpg)
People look at a Zhi-20 (Z-20) helicopter during the 5th China Helicopter Exposition in north China's Tianjin, Oct. 10, 2019. A fleet of China's new self-developed Z-20 helicopters has made a demonstration flight at the ongoing helicopter expo in the city of Tianjin. (Xinhua/Li Ran)