He's saying here as an answer to "Why Russia is sanctioning DPRK?" basically this:
"Russia wasn't sanctioning DPRK, Security Council was. Sanctions were implemented in completely different enviroment, and, as always, the West did not do anything on their part what we were agreing on. Russia and China were lied to, and the West is suppling weapons to South Korea, SEVERAL YEARS AGO WE AGREED WITH CHINA THAT THERE WILL NO BE NEW SANCTIONS ON DPRK"
By the way, I have limited knowledge of English, and also were writing basic meaning of his words, not literal translation
It's actually more than that, it means that they plan on increasing bilateral trade and economic ties in a massive way such that the old sanctions will become increasingly obsolete as they will simply develop more and more ways of circumventing them.
In effect the sanctions will still be there (because it's virtually impossible to lift Security Council sanctions ever as the West has veto power) but they will be an empty formality. Make no mistake, these developments that we're seeing are HUGE.
Announcing this now though, is an indication of intentions. And the intentions are probably to raise trade with DPRK as a first stage. There's also a possibility that DPRK might attempt to join BRICS for trading.