According to multiple outlets communication between the DRPK and the via diplomats has ceased. This looks more symbolic than anything else. On top of that - these facilities aren't necessary anymore because they achieved their goal - they developed the rocks necessary for the ICBM. They're already producing them.
Again, none of this means anything. This is not substantively different from the past. On top of that - China is incentivized to utilize the DPRK as a hedge against the US so long as Trump continues with the tariffs. I expect nothing from this.