Romanian President Klaus Iohannis (L) holds a meeting with Polish President Andrzej Duda (not in the picture) in Warsaw, Poland, on June 7, 2018. Iohannis started a two-day visit in Poland on Thursday. (Xinhua/Jaap Arriens)
In pics: view inside greenhouses in N China's Hebei
In pics: curtain wall project of sky corridor in SW China's Chongqing
Making traditional handicrafts increases income of local women in SW China's Guizhou
Over 7,000 heavy-haul freight train trips made on Watang-Rizhao Railway in 2018
Snow scenery of Washington D.C.
Frosty scenery seen in Tianjin