Aerial photo taken on May 13, 2020 shows tourists viewing blooming rhododendrons at Dawei mountain national forest park in Liuyang, central China's Hunan Province. (Xinhua/Chen Zeguo)

Photo taken on May 13, 2020 shows blooming rhododendrons at Dawei mountain national forest park in Liuyang, central China's Hunan Province. (Xinhua/Chen Zeguo)

Aerial photo taken on May 13, 2020 shows blooming rhododendrons at Dawei mountain national forest park in Liuyang, central China's Hunan Province. (Xinhua/Chen Zeguo)

Aerial photo taken on May 13, 2020 shows tourists viewing blooming rhododendrons at Dawei mountain national forest park in Liuyang, central China's Hunan Province. (Xinhua/Chen Zeguo)