1. Upon arrival at Hong Kong Airport, go to the duty-free shop area in the arrival hall or departure hall. Usually, these places will provide gold sales services.

2. Find the counter or shop selling gold. There may be many choices in the duty-free shop area.

3. Communicate with sales staff and ask them about the type, price and authoritative certification of gold products. Make sure you know the purity, weight and current market price of the product.

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

5. After the payment is confirmed, you will get the purchased gold products, and generally you will receive invoices or receipts as proof of purchase.