Chinese President Xi Jinping had considered visiting Singapore until just before the unprecedented U.S.-North Korea summit was held earlier this week in the city-state, diplomatic sources said Friday.But the plan was dropped after China realized that U.S. President Donald Trump and North Korean leader Kim Jong Un were unlikely to agree at Tuesday's summit to promote talks toward signing a peace treaty to end the Korean War, according to the sources in Beijing and Singapore.China has welcomed the start of official talks between the United States and North Korea, but at the same time worries …READ FULL ARTICLE