(From L to R) Swedish Prime Minister Stefan Lofven, Finnish Prime Minister Juha Sipila, Italian Prime Minister Paolo Gentiloni and Estonian Prime Minister Juri Ratas attend the Special European Council summit at the EU headquarters in Brussels, Belgium, on April 29, 2017. The 27 European Union countries' leaders during their first summit since Britain triggered the Article 50 last month adopted unanimously the guidelines on Brexit, European Council President Donald Tusk tweeted Saturday. (Xinhua/Gong Bing)
