From SOFREP:

Incredibly, Secretary of State Blinken said that Chinese influence in Afghanistan could be a positive thing if China sought a “peaceful resolution of the conflict,” and a “truly representative and inclusive” government. Yet, China doesn’t have a government that could be called “representative and inclusive” by anyone. So, why would they work towards one in Afghanistan?

Yet, it’s not unlikely that the Taliban held meetings with the Chinese intelligence service that could have aided in Taliban planning and operations.

Anyone who understands diplomacy and espionage can do the math and see that the Taliban are solidly backed by China. This could have emboldened them to take back Afghanistan in true blitzkrieg style as they did.