President Trump said Monday he believes North Korean leader Kim Jong Un will honor an agreement between the two countries to eliminate nuclear weapons on the Korean Peninsula, but warned China against trying to work against that agreement.

“I have confidence that Kim Jong Un will honor the contract we signed &, even more importantly, our handshake,” Trump tweeted. “We agreed to the denuclearization of North Korea. China, on the other hand, may be exerting negative pressure on a deal because of our posture on Chinese Trade-Hope Not!”