Quickie
Colonel
You need to take out the exports between mainland China (CHN) and Hong Kong (HK) to avoid double counting. Let's do a quick calculation. Hong Kong export and import to/from CHN are from.
CHN export: overall X = $3600B, to HK x = $268B
HK export: overall Y = $610B, to CHN y = $350B
Net CHN + HK export = (X - x) + (Y - y) = $3332B + $260B = $3592B ~ 3.6T
So the net effect of adding Hong Kong export is negligible, which makes sense since HK is more of trade intermediary for CHN.
Only a certain percentage of the amount of $268B and $350B are reexported, with the rest locally consumed. The reexported is also normally with added value.
Taking into account this, the Net of both CHN + HK could be much higher.
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