But the United States would expect significant movement by Kim towards denuclearization in return.
In Singapore, Kim pledged to work toward complete denuclearization of the Korean peninsula, but the vague agreement struck there has produced few concrete results. U.S. Democratic senators and security officials have warned Trump against cutting a deal that would do little to curb North Korea’s nuclear ambitions.
Kim, travelling from the North Korean capital by train, arrived at the station in the Vietnamese town of Dong Dang after crossing over the border from China, a Reuters witness at the station said.
Vietnamese officials were on hand to receive him at the station with a red-carpet including a guard of honor and North Korean and Vietnamese flags flying.
Kim left his train in Dong Dang and set off on the 170 km (105 miles) journey to the capital, Hanoi, by car.
Both Kim and Trump are also due to hold separate talks with Vietnamese leaders.
U.S. Secretary of State Mike Pompeo also arrived in Hanoi, on Tuesday, a reporter travelling with him said.
Pompeo has been Trump’s top envoy in his efforts to improve ties with the reclusive North and has made several trips to Pyongyang to negotiate steps towards ending its nuclear program.