Oil prices fell on Wednesday after three consecutive sessions of gain as Donald Trump headed to China for a high-stakes summit with Xi Jinping . Brent crude lost 73 cents to settle at $107 a barrel and US West Texas Intermediate fell 62 cents to $101.60, pulling back from a rally that had pushed both benchmarks up on fading hopes for a lasting ceasefire to end the US-Israeli war against Iran. The benchmarks have hovered at or above $100 since the US and Israel launched strikes on Iran in late February and Tehran retaliated by effectively closing the Strait of Hormuz. Brent has surged from roughly $70 per barrel before the war began. China is the world's largest buyer of Iranian oil and any discussion at the summit about the strait's closure or Tehran's nuclear programme is likely to move markets significantly. Mr Trump said on Tuesday he did not think he would need China's help to end the war, even as prospects for a peace deal appeared to dim and Tehran tightened its grip on the critical waterway.…