North Korea's nuclear and missiles program will undoubtedly play the main role in the meeting, in which both leaders will try to pool their respective approaches.
In May, North Korea accused US and South Korean spy agencies of plotting to kill Kim Jong-un with some "biochemical substances", the country's Ministry of State Security said, as quoted by AFP.
However, North Korean International Olympic Committee (IOC) member Chang Ung ruled out the idea of a North-South team, telling the Dong-a Ilbo newspaper that it was an unrealistic aim in the present political climate.
China is seen as North Korea's main ally and the USA hopes Beijing can have greater influence on the totalitarian state to stop both its missile tests and nuclear programme.
There is considerable opposition to the USA deployments of the Terminal High Altitude Are Defense (THAAD) anti-missile system in South Korea. To further guard against anything with intercontinental range, the United States on May 20 successfully tested a more robust anti-missile system on one of its own long-range missiles.
The death last week of University of Virginia student Otto Warmbier after a year in North Korean detention added a poignant note to what had been mainly concern about the North's accelerating nuclear and missile threat.
On Thursday, North Korea carried out another test of a rocket engine as part of the program developing an intercontinental ballistic missile (ICBM), which is capable of carrying a nuclear warhead, and reaching the US mainland.
That suggests that Pyongyang is deeply upset at China's oil embargo on as well as its restrictions on coal imports from North Korea.
Moon has vowed to reform the country's prosecutors' office by making it more independent from politics.
A brutal conflict to reunify the peninsula ensued and US -backed forces have remained officially at war with the DPRK since an armistice was signed on July 27, 1953. But the risk has now become unacceptable given North Korea's expanded stock of missiles, some of which may already be nuclear capable.
China traditionally has served as North Korea's economic lifeline.
They also demanded the US stop enforcing the deployment.
But if the incident leads the USA to impose a travel ban on North Korea, it could undermine ongoing efforts to open up the isolated North through social and cultural exchanges with the outside world, the scholar predicted.
9am South Korean Prime Minister Lee Nak Yon called on North Korea to stop its ballistic missile tests and nuclear programme on the the 67th anniversary of Korean war on Sunday.
Trump, increasingly frustrated with China over its inaction on North Korea and bilateral trade issues, is now considering possible trade actions against Beijing, senior administration officials told Reuters.