"China has consistently held that sanctions are not the goal in themselves", Geng said at a daily briefing.
In May 2015, South Korea's spy agency told lawmakers that Kim had ordered his defense chief executed with an anti-aircraft gun for complaining about the young ruler, talking back to him, and sleeping during a meeting over which he was presiding.
Beijing's participation in the penalties is a key to keeping them in play against Kim's regime.
"But again, as we learn from the past, North Korea will agree to take these steps, but you can't trust them ultimately to fulfill what they commit to", he said.
Warmbier's mother Cindy told a United Nations symposium on the human rights situation in North Korea last month: 'I can't let Otto die in vain.
"Something happened from that day - it was a awful thing, it was brutal, but a lot of people started to focus on what was going on, including North Korea".
"It's important for us to remember that it's largely words at this point, and that we have to look for actions, particularly from North Korea", Panetta said during an interview with FOX Business' Neil Cavuto on Tuesday.
This kind of a face-to-face meeting with a U.S. president is something that North Koreans have wanted for decades and Kim Jong-un can say he succeeded. "I think without Otto, this would not have happened", Trump told reporters at a Tuesday news conference in Singapore. That deal reportedly includes a commitment to a "complete denuclearization" of the Korean peninsula aimed at establishing a "peace regime".
He taunted Mr. Kim as "little rocket man", and warned that the US would "totally destroy" North Korea.
Warmbier, 22, was a student at the University of Virginia when he was arrested in North Korea in January 2016 for allegedly stealing a propaganda poster.
'No, I think I've helped them, because I think things will change. We're not special, but we're Americans and we know what freedom's like, and we have to stand up for this.
The parents, Fred and Cindy Warmbier, are suing North Korea alleging that the country violated global law by killing their son.
Sputnik: How would you assess the agreement that they ended up signing? While North Korean denuclearization is undoubtedly a good thing, some worry that Kim is all talk. "Very few people at that age - you can take one out of 10,000 - probably couldn't do it".