Secretary of the Central Committee of the Workers' Party of Korea, Choe Ryong Hae, led the North Korean delegation, which also included economic, diplomatic and military personnel. The delegates visited Vladivostok, Khabarovsk and Moscow. The delegates met with Russian President Vladimir Putin and presented him with a letter from North Korean leader Kim Jong Un. The two sides also revisited the possibility of linking Russian natural gas pipelines to and through North Korea to South Korea. Korea The meeting comes as Moscow seeks to expand economic activity in North Korea, as well as improving sea and land corridors between Russia's far east and South Korea. Russia has invested in the development of port facilities in North Korea's northeast Rason Special Economic Zone and updated rail lines running into North Korea.