No quick fix to US-Russia differences

Editor's note: US President Donald Trump initially said his summit meeting with Russian President Vladimir Putin in Helsinki, capital of Finland, on Monday was a "success". But under tremendous domestic pressure, a day later he reversed his denial of Russian meddling in the 2016 US election. Two experts share their views on US-Russia relations with China Daily's Pan Yixuan. Excerpts follow:

Leaders' pursuit may hit roadblock