There are two articles on T—Zh that may be useful to you, especially during the holiday season.

I speak as a person who has had administrative trouble for bringing in alcohol over the limit and spent almost 5 night hours inventorying "contraband" property and endless dialogues on the topic "why do you need so much wine" (I was bringing 6 bottles instead of the allowed 4).

Article about bringing alcohol into Russia here.
About bringing alcohol into the EU here (also many restrictions).
And here is about China.

Now the rules have become stricter, so it's better to familiarize yourself, it's definitely not superfluous.