North Korean Foreign Minister Pak Ui-chun says he is satisfied with the results of his four-day trip to Russia.

Pak made the comment upon his return to Pyongyang from Moscow on Thursday, saying that he and Russian officials exchanged opinions on various issues.

The North’s Foreign Ministry said in a statement earlier that Russia and North Korea agreed to work together to maintain peace and stability on the Korean Peninsula through bilateral and multilateral consultations, including the six-nation nuclear talks.

Earlier on Monday, the Russian Foreign Ministry said its officials had made clear during a meeting with Pak that Moscow believes Pyongyang should be criticized for its artillery attack on South Korea’s Yeonpyeong Island last month.