The fleet required to sustain Chinese overseas bases

Would Chinese bases and arms relationships in Argentina create a major new threat?

Only if China can sustain them across contested oceans; without that fleet and logistics system, a distant base may be more burden than advantage.

A global base network only works if a navy can keep trade and supply routes open under fire. Britain historically built a large fleet for sea control and commerce protection because distant bases depended on that maritime system. China would need comparable reach before an Argentine base became more than a vulnerable obligation. The actual carrier groups, logistics chain, and economic relationships matter more than the existence of a base agreement alone.