In Hong Kong, the benchmark Hang Seng Index opened up one point at 26,391.
The China enterprises index was down 23 points, or 0.26 percent, at 8,835 while the tech index was six points, or 0.13 percent, lower at 5,069.
On the mainland, the Shanghai Composite Index opened down three points, or 0.09 percent, at 4,174.
The Shenzhen Component Index opened up seven points, or 0.05 percent, at 15,753 while the ChiNext Index opened up six points, or 0.17 percent, at 3,957.
Xi and Trump are scheduled to have tea and lunch before the US president flies home.
Trump was informed by Xi on Thursday that negotiations on trade issues had reached “balanced and positive outcomes”.
Gary Tan, portfolio manager at Allspring Global Investments, said the summit could act as a strategic springboard for further engagement.
“As market expectations for any immediate breakthrough entering the summit are already low, any signs of incremental progress should be taken positively by the market,” Singapore-based Tan said.
Trump told Fox News Channel that China has agreed to buy 200 Boeing jets, a number that was far fewer than analysts had expected.
It was undecided whether the trade truce will be extended after it expires later this year, US Trade Representative Jamieson Greer told Bloomberg TV on Friday, but added deals had been firmed up on Chinese purchases of farm goods, beef and Boeing aircraft.
In Tokyo, the Nikkei was 767 points, or 1.23 percent, down at 61,886 at one point before midday.
In Seoul, the Kospi was 176 points, or 2.21 percent, lower at 7,804 at one point before lunch after opening down 29 points, or 0.37 percent, at 7,951 and hitting a high past the 8,000 mark. (Reuters & Xinhua)
