Mr. Kim’s presence at a Chinese military parade was a sign of his growing geopolitical ​leverage and that North Korea was being accepted as a de facto nuclear power.

President Trump’s extraordinary summit with President Vladimir V. Putin of Russia last month has yet to yield any concrete results on the war in Ukraine.

Rides in his hulking bulletproof Aurus with the Indian and North Korean leaders offered the Russian leader an ideal setting for deepening ties.

Kim Ju-ae’s presence at a major gathering of world leaders is the latest sign that North Korea’s dictator considers her a successor, analysts said.

The parade, attended by the leaders of Russia and North Korea, had a defiant message. President Trump fired back, accusing Xi Jinping of ignoring America’s role in the war.

Washington’s increasing focus on Beijing is straining the decades-old alliance between South Korea and the United States.