these are the remains of soldiers who died south of the 38 line, most died in South Korea. I believe most remains in North Korea have been sent home and accounted for after the war.Did China send kids to fight in the Korean war ? Why are those coffins so small ? And why 70 years later ?
South Korea has been decent enough to find the remains of PVA and return to China, in batches. This is the first time a Y-20 is used to return them home (no longer the Russian IL-76) so it is a pretty big deal.
On this note, Y-20 has been very active this year! Supplying Wuhan early in the year for the pandemic, carrying armors to Russia for military games now to this, it is good to see it in use so often! These PVA soldiers surely will be glad to know they are returning home on a Chinese transport plane.