North Korea has previously ratcheted up fiery rhetoric or conducted weapons tests to wrest outside concessions.

A North Korean official on Saturday said that the U.S. and South Korea are dreaming if they think that U.S. President Donald Trump’s sending a birthday message would get leader Kim Jong Un back to the negotiating table.

The test possibly involved technologies to improve intercontinental ballistic missiles that could potentially reach the continental United States.

Kim Yong Chol said Trump’s tweets clearly show that he is an irritated old man “bereft of patience.”

The images and Kim’s rhetoric appeared aimed at bolstering his leadership at home as the North tries to pressure the United States into making concessions in nuclear diplomacy.

In a statement released by North Korea’s official Korean Central News Agency, Choe expressed optimism over the outcome of the meeting but did not say where it would take place.

Trump praised the North Korean leader in his tweets, saying he has a “great and beautiful vision for his country.”

North Korea said it is infuriated over U.S.-South Korean plans to hold military drills that the North says are invasion rehearsals and proof of the allies’ hostility to Pyongyang.

North Korea's Foreign Ministry said Washington's pattern of "unilaterally reneging on its commitments" was leading Pyongyang to reconsider its own commitments to discontinue tests of nuclear weapons and intercontinental ballistic missiles.

The three new missiles North Korean leader Kim Jong Un has tested over the past week are eerily familiar to military experts