China Confirms Likely Answer to a Superficial Submarine Question

The Submarine Question:

[13 FEB 2017]  "Does China Have a Nuclear Submarine That Could Beat the U.S. Navy?"  

China's Simple Answer:

[20 FEB 2017]  "China wants foreign submarines to stop traveling below the surface in the vast waters it claims"

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 So much for the U.S.'s technical superiority, then? NOT

Submarines are always silent and strange.