can i take 4 or 5 litres of cask wine into china

Oh, the regulations shows that you could bring no more than 1500ml of wine with alchoholic level over 12%. The part more than 1500ml will be taxed and the taxed rate is 50%. And it should only be put in the check-in luggage. When checking in the luggage, you can inform the airport staff and see whether if you need to find another package to transport the wines.