Four days before the summit, North Korea provoked the worldwide community with its first intercontinental ballistic missile (ICBM) launch. The South Korean military said this was a “stern response” to North Korea, simulating the destruction of North Korean missile launchers. The statement appears to be a reference to the U.S. Department of the Treasury’s decision to sanction Chinese companies and citizens for doing business in North Korea in violation of global sanctions prohibiting such activities.It is no secret who Geng is addressing here: the so-called “China responsibility theory” has been the consistent centerpiece of Donald Trump’s thinking on North Korea.China claims it shouldn’t be exclusively responsible for solving the North Korean nuclear crisis. “I think this either shows lack of a full, correct knowledge of the issue, or there are ulterior motives for it, trying to shift responsibility regarding the matter”. The world is looking for USA leadership regarding North Korea, not a buck-passing tweet.”It’s an honour to have you as a friend”, Mr Trump told Mr Xi, telling him he appreciated actions the Chinese leader had already taken on North Korea. It is time for Moon to focus on resolving the nuclear crisis, while pressuring Pyongyang and at the same time encouraging China to join the effort.Unsettled by North Korean missile and nuclear programs, Washington has adopted a war-like posture, sending a strike group and conducting joint military drills with North Korea’s regional adversaries Japan and South Korea.Trade between China and North Korea grew nearly 40% in the first quarter.Xi told Trump that China remains “firmly committed to denuclearizing the (Korean) peninsula”, according to a report from China’s state-run Xinhua news agency.In his remarks before the talks, Xi did not directly address North Korea, but acknowledged “differences” and the need to work broadly together with the United States.Always mercurial, the Sino-US relationship has become extremely hard to predict of late, certainly from the American side.China will not solve North Korea. She stressed that much of the burden of enforcing the resolutions rests with China because it is responsible for 90 percent of trade with its neighbor.The two countries also called on Washington and Seoul to reverse the deployment of the controversial US missile shield known as Terminal High-Altitude Area Defense, or THAAD, which China sees as a major threat to its security.