Earlier this year, a report submitted to the United Nations Security Council described a partnership between the two regimes to resume missile cooperation.
China is also understood to be in the business of developing hypersonic weaponry, although Beijing has gone down the route of developing drones.
In late 2019, the communist regime unveiled the Dongfeng-17 (DF-17), which is a medium-range ballistic missile armed with a DF-ZF hypersonic glide vehicle (GHV).
This year, so far, North Korea has unveiled three new weapons.
Prior to the Hwasong-8 launch, North Korea fired a ballistic missile from a train as well submarine-launched warhead.