Chinese President?Xi Jinping?(R) holds a welcome ceremony for visiting Gambian President Adama Barrow before their talks in Beijing, capital of China, Dec. 21, 2017. (Xinhua/Xie Huanchi)

BEIJING, Dec. 21 (Xinhua) -- Chinese President Xi Jinping on Thursday underscored the one-China policy as he hosted Gambian President Adama Barrow on his first China visit since diplomatic relations were resumed last year.