President Trump ​called North Korea’s most recent nuclear test “hostile and dangerous” and said the outlaw regime can “only understand one thing.”

​“South Korea is finding, as I have told them, that their talk of appeasement with North Korea will not work, they only understand one thing!” Trump tweeted​ on Sunday​.

​He said North Korean President Kim Jong-un’s regime’s military provocations continue to be a threat to the United States. ​​

​”​North Korea has conducted a major Nuclear Test. Their words and actions continue to be very hostile and dangerous to the United States,” the commander-in-chief tweeted around 7:30 a.m.

​The presidential tweet​s​ came a few hours after North Korea​’s ​state media claimed it had successfully tested a hydrogen bomb meant to fit on an intercontinental ballistic missile.

The announcement followed the discovery of a 6.3 magnitude earthquake detected near the ​country’s known nuclear site, indicating that​ Pyongyang ​had conducted a sixth nuclear test.

In his morning tweets, the president also addressed China and South Korea’s role in ​trying​ to tamper down North Korea’s nuclear ambitions.

“North Korea is a rogue nation which has become a great threat and embarrassment to China, which is trying to help but with little success,” he tweeted.

T​rump has pressured China, North Korea’s largest trading partner, to use its influence on Kim’s government to curb its weapons development program. ​​

South Korean President Moon Jae-in held a meeting of its National Security Council on Sunday and said it would try every measure, including more sanctions and an increased US military presence, in reaction to the test.

North Korea successfully test-fired two ICBMs in July with enough range to strike the mainland United States.