I have a question, how does China get rid of old military equipment and ammo? The US and NATO can always stir up a conflict and periodically dump them in foreign countries (e.g., Ukraine), but what can China do? Can less developed countries even take as much old military equipment as China has to offer? What about non-country entities like the Wa military? Are there other groups like them which China has ties to?
There are clearly political costs to just donating/selling old equipment to friendly nations (NK, Cambodia, Pakistan, Serbia), but maybe this outweighs the economic and environmental costs of destroying the equipment on Chinese soil.