U.S. President Donald Trump met with Vietnamese leaders during his trip for the second summit with Chairman Kim Jong-un in Hanoi Wednesday, when he called Vietnam a "good example" for North Korea.

Trump held talks with Vietnam's Party chief and President Nguyen Phu Trong, and Prime Minister Nguyen Xuan Phuc, praising the "tremendous progress" Vietnam has made since his last visit in late 2017.

He thanked Vietnam for hosting the second summit between him and North Korean leader Kim.

"It's a very important summit in Vietnam because you're really are an example of what can happen with good thinking," he said, suggesting that North Korea can enjoy the same growth as Vietnam if it denuclearizes and achieves peace with the United States.

Both sides also witnessed the signing of major aviation deals.

President Trump arrived in Hanoi Tuesday night for his second summit with North Korean leader Kim Jong-un, who came in Vietnam after a more than 60-hour train journey in the morning.

He is set to have a one-on-one conversation and dinner with Chairman Kim later on Wednesday.

This is Trump's second visit to Vietnam after November 2017, when he attended the APEC Summit in Da Nang and paid a state visit to Hanoi.