[PIF]

“The Y-20’s four-meter tall hold can lift up to 66 tons, and transport up to 2 Type 15 tanks or 1 Type 99A tank over a distance of 7800 km.”
https://en.wikipedia.org/wiki/Xi‘an_Y-20

Or one heel of a lot of artillery shells.

[marcusmaximus]

China could launder that weapons shipment through Turkey. We’ll know in a few hours.

[FtrPilot]

According to an unreliable source, 1 Russian artillery shell weighs 50.8kg

At 66 tons, the Y-20 can transport 1178 artillery shell.

Supposedly, Russia is firing 60,000 shells per day.

At that rate, it would take 51 sorties in the Y-20 to transport the shells for one day's firing.

Over the 360 days of the war, Russia is losing an average of almost 5 tanks per day.

So, I'm thinking this Y-20 is transporting EW gear and drones.