His decision to revise his friendly approach toward China was based on China's continued illegal transactions with North Korea: a clear message that the U.S.is no longer expecting cooperation from China.
But at the same, Xi said relations "have been affected by some negative factors" and the Chinese side has already expressed its position to the US, Chinese state media reported.
USA sanctions against a Chinese bank over dealings with North Korea and the sailing of a US destroyer close to a Chinese-claimed island in the South China Sea.
Over the weekend, the USA sent a warship through Chinese claimed waters in the South China Sea.
In less than one week, the United States has finalized a $1.4 billion arms sale to Taiwan, labeled China one of the world's worst human traffickers and imposed sanctions on a Chinese bank for doing business with North Korea.
During the U.S. -China meeting, U.S. officials identified a dozen or so Chinese trading companies and banks that have supported efforts by North Korean companies involved in developing nuclear weapons and ballistic missiles.
It was the second american operation meant to challenge the claims of Beijing in the sea area since the coming to power of Donald Trump.
Still, he said, the gesture seemed to indicate that China was seeking to maintain "stability and some momentum" with Mr Trump and perhaps deter him from resorting to more extreme measures, such as a military response.
China's defence ministry issued a similar statement, saying it would bolster patrols and take precautions commensurate with the threat level to safeguard "national sovereignty and security".
In the press release, the White House makes no mention of the american war ship, but states that the two men will meet at the G20 summit held in Hamburg (Germany) this week.
North Korea claimed on Tuesday to have successfully test-launched its first intercontinental ballistic missile in a move that could be a game-changer in what may be the world's most unsafe nuclear standoff.
Trump intensified the pressure on China by making a phone call earlier on Sunday to Japanese Prime Minister Shinzo Abe. They highlighted "their unity with respect to increasing pressure on the regime to change its risky path", the administration said.
The U.S. has dreaded the day that North Korea developed a missile capable of hitting the homeland with a nuclear warhead.
But Trump acknowledged recently that those efforts had failed. Under that policy, which has been in place since 1972, the United States recognised a single Chinese government in Beijing and severed its diplomatic ties with Taiwan.
Relations between the two nations had been warmer since Mr Trump and Mr Xi met in April, but Washington has taken a series of actions that have infuriated Beijing in recent days.
"Although Washington has many times reaffirmed that it subscribes to the one-China policy, it should take actions that honor its words, rather than eating its words", Ruan said. On June 29, the Trump administration approved a $1.4 billion arms sale to Taiwan and blacklisted a small Chinese bank over its business ties with North Korea.