This https://en.wikipedia.org/wiki/Self-harm is what Japan and ROK are doing.
No progress today https://twitter.com/pxbrqnaZJT1917W/status/1195281087733223425
North Korea Says It Issued Ultimatum to South Over Resort
Kim raised the subject again during his New Year’s speech this year, saying that Pyongyang was ready to restart the projects “without any precondition” while making a nationalistic call for stronger cooperation between the Koreas.
But without a breakthrough in larger nuclear negotiations between Washington and Pyongyang, the inter-Korean economic projects remain shelved. North Korea in recent months has suspended virtually all diplomacy and cooperation with the South while demanding Seoul break away from its ally Washington and restart inter-Korean economic activities.
https://www.voanews.com/east-asia-pacific/north-korea-says-it-issued-ultimatum-south-over-resort
If there is no progress on the GSOMIA case Kim and/or China will win.
It is difficult to find solutions if the involved parties have prestige and are afraid of loosing face.