1. After arriving at Hong Kong Airport, go to the duty-free shop area in the arrival hall or departure hall. Often, these places offer gold sales services.

2. Find a counter or store that sells gold. There may be several options to choose from within the duty-free shop area.

3. Communicate with the sales staff and ask about their gold product types, prices, authoritative certifications and other information. Make sure you know the purity, weight and current market price of the product.

4. After confirming the gold product you want to purchase, provide the required amount for payment. Accepted payment methods may include cash, credit card or other electronic payment methods.

5. After payment is confirmed, you will receive the purchased gold product, and usually receive an invoice or receipt as proof of purchase.