Aerial photo taken on Oct. 17, 2019 shows the scenery of Luonan County in northwest China's Shaanxi Province. The county is located in the Qinling Mountains area. (Xinhua/Tao Ming)

　　Aerial photo taken on Oct. 17, 2019 shows the scenery of Luonan County in northwest China's Shaanxi Province. The county is located in the Qinling Mountains area. (Xinhua/Tao Ming)

　　Aerial photo taken on Oct. 17, 2019 shows the scenery of Luonan County in northwest China's Shaanxi Province. The county is located in the Qinling Mountains area. (Xinhua/Tao Ming)

　　Aerial photo taken on Oct. 17, 2019 shows the scenery of Luonan County in northwest China's Shaanxi Province. The county is located in the Qinling Mountains area. (Xinhua/Tao Ming)

　　Aerial photo taken on Oct. 17, 2019 shows the scenery of Luonan County in northwest China's Shaanxi Province. The county is located in the Qinling Mountains area. (Xinhua/Tao Ming)

　　Aerial photo taken on Oct. 17, 2019 shows the scenery of Luonan County in northwest China's Shaanxi Province. The county is located in the Qinling Mountains area. (Xinhua/Tao Ming)

　　Aerial photo taken on Oct. 17, 2019 shows the scenery of Luonan County in northwest China's Shaanxi Province. The county is located in the Qinling Mountains area. (Xinhua/Tao Ming)

　　Aerial photo taken on Oct. 17, 2019 shows the scenery of Luonan County in northwest China's Shaanxi Province. The county is located in the Qinling Mountains area. (Xinhua/Tao Ming)

　　Aerial photo taken on Oct. 17, 2019 shows the scenery of Luonan County in northwest China's Shaanxi Province. The county is located in the Qinling Mountains area. (Xinhua/Tao Ming)