Hey there! Great question. When selling from China to Europe you will likely ship products via ePacket which means that customs and duties are paid by the exporter and not the recipient. So you will not have to concern yourself with duties.
With respect to VAT taxes -- it can differ from country to country so it's important to understand the specific and nuanced eCommerce regulations where you reside. My understanding is that you're only required to charge VAT after you reach certain thresholds, which can also vary based on the country you are from and the one you're selling into.
You can set specific taxation rules in your Shopify Tax Settings to reflect your needs. This article covers VAT taxes and how you can comply with the rules. I hope this helps! If you have any more questions, please let me know.