Can I deliver a parcel from UK to HK by just putting the parcel in the red letter box?

Can I deliver a parcel from UK to HK by just putting the parcel in the red letter box?

So one of my subscribers won a giveaway on my YouTube channel: AaronsTech.
He lives in Hong Kong and he won a Minecraft game.
Problem is that can I just stick in the game in the red letter box with the right address and it will send?
Please help me thanks.

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