From placing the order to clearing customs — the mechanics of importing.
Importing from China means: source and verify a supplier, place an order with clear terms, arrange freight (usually via a forwarder), and clear customs in your country by declaring the goods under an HS code and paying duty and taxes. A freight forwarder handles most of the shipping and customs mechanics for you.
On arrival you pay import duty (set by the HS code) plus import taxes like VAT or GST, on the customs value. Your freight forwarder or a customs broker usually files the declaration and pays on your behalf. Budget these into your landed cost before ordering — they change which supplier is really cheapest.
For a first import, keep the order small, use a forwarder for door-to-door service, and confirm the HS code and duty in advance. The mechanics get routine quickly; the mistakes that hurt are an unverified supplier or an unbudgeted duty bill.