Estonian President Kersti kaljulaid (L, front) hosts an official welcoming ceremony for visiting Ukrainian President Petro Poroshenko (R, front)in Tallinn, capital of Estonia on Jan. 23, 2017. Kersti Kaljulaid met Monday with Petro Poroshenko on bilateral relations, the situation in Eastern Ukraine, and relations between Ukraine and the European Union (EU). (Xinhua/Sergei Stepanov)