HANOI, Vietnam — As he boarded his train for the long journey home Saturday, Kim Jong Un grinned, waved and clasped his hands above his head like a boxer celebrating victory.

North Korean state media has already proclaimed his summit meeting with President Trump in Vietnam a success, but in reality the North Korean leader embarks on the long journey home largely empty-handed. He is likely to spend part of the time pondering his next move, especially because he has set great store in a campaign to revive the country’s economy.

“The North Koreans are in a seriously troubling situation now,” said Andrei Lankov, a North Korea expert at Seoul’s Kookmin University.

“Kim Jong Un is still under pressure from sanctions, and it’s not clear what to do with the Americans. Most likely they will still keep talking, because Donald Trump remains very, very dangerous.”

After the breakdown of the summit the previous day, Kim spent Friday meeting with Vietnam’s top leaders in Hanoi.

There was the usual pomp and ceremony, with a communist tint: Kim stood beside President Nguyen Phu Trong at a welcome reception outside the presidential palace as a military band played the two countries’ national anthems, and ambled down a red carpet past an honor guard, flanked by a goose-stepping soldier in a white uniform.

There was a banquet and an arts performance, and Saturday morning a chance to solemnly pay his respects to the embalmed body of Ho Chi Minh, the leader of Vietnam’s Communist revolution, before his motorcade set off north for the Chinese border.

But there were no trips to manufacturing or tourism projects in the port city of Haiphong or Ha Long Bay that had been foreshadowed, and were supposed to signal North Korea’s intent to open its economic doors to the world.

“Despite the upbeat portrayal in the state media, the summit collapse should have left Kim and his aides in grave shock,” said Cheong Seong-chang, a North Korea leadership expert at South Korea’s Sejong Institute.

“In that state of mind, they seemingly didn’t have the bandwidth to travel to factories in Haiphong factories or to Ha Long Bay, and decided to limit their activities to official bilateral events with the Vietnamese leadership.”

Earlier in the week, a senior North Korean delegation had visited a series of factories in the port city of Haiphong, including a plant making the country’s first domestically produced car, a telecommunications factory owned by the military, a plastic bag factory and a high-tech agricultural zone, according to Vietnamese state media.

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