Meanwhile, North Korea has put the final touches on preparations for Sunday's anniversary, with some high school and university students apparently practicing for torchlight marches and mass games.
Global journalists have been invited to watch a military parade as it weaves through the capital Pyongyang on Sunday, a torch-lit rally and the Mass Games, a highly choreographed event expected to involved hundreds of thousands of people.
A large display of ballistic missiles would be widely seen as provocative.
North Korea is known for signaling its future intentions and policies by indirect and sometimes opaque methods, so experts will be watching events closely for insight into what leader Kim Jong Un and his top aides are thinking - especially as negotiations with the United States over North Korea's nuclear arsenal appear to have reached a deadlock.
Under Kim's one-man rule, the country has also been accused of widespread human rights abuses, with a United Nations report past year estimating between 80,000 and 120,000 people are held in prison camps.
Although North Korea stages military parades nearly every year, and held one just before the Olympics began in South Korea in February this year, Sunday's parade comes at a particularly sensitive time.
And South Korean President Moon Jae-in was slated to travel to Pyongyang on September 18 for the first such trip in 11 years.
North Korea, which says its nuclear program is aimed at countering US military threats, has demanded the United States jointly declare the end the 1950-53 Korean War, which ended with an armistice not a peace treaty. Whether North Korean leader Kim Jong-un attended the event has not been confirmed yet. "It seems that the North wants the South Korean government well aware of its intentions to persuade the U.S.in order to advance the overall process", Koh pointed out.
Thousands of North Koreans participate in the "Arirang" mass games in Pyongyang, North Korea.
North Korea's state-run media published Friday what it said was an "indictment" by its South Korean wing, denouncing USA forces on the peninsula and calling their withdrawal "the irresistible trend of the times".
Now the question is whether Kim's latest direct message to President Trump could reignite the once-stalled denuclearization talks between the two sides. It will be the first time that a Chinese leader participates in the annual economic forum hosted by Russian Federation. However, it also covers the fact that Kim has not really given away many tangible concessions in his nuclear negotiations.
Although China provided crucial backing to United Nations sanctions previous year, Trump has since accused Xi of relaxing pressure in retaliation over their trade disputes. North Korea rarely releases much information about these sorts of events ahead of time, though they have sent out invitations to diplomats living here.
The United States has 28,500 troops in South Korea and Trump has said in the past it should consider reducing the number unless Seoul shoulders more of the cost.