According to the diplomat, after the U.S. dropped the opportunity to negotiate with North Korea on the summit in Vietnam, Kim Jong-un might reconsider the moratorium for missile launches and nuclear tests.
It is expected that the North Korean leader would soon announce his decision in that regard, as well as the further talks on de-nuclearization with the U.S. Choe Son-hui also added that Washington had better stretch a point for if it still wants to negotiate.
The summit in Vietnam took place on February 27. Donald Trump and Kim Jong-un met and spoke tet-a-tet for about 20 minutes; a working lunch followed, with members of both delegations involved. The major part of the negotiations was slated for February 28, but it appeared that they ended early, and the de-nuclearization agreement was not signed.