- Do research, especially for high-value items. For electrical goods, research on the products and their functions, what could be the common problems to look out for. （（这一条对你最重要））
- Check goods are in good condition. When buying groceries, check the expiry date of food items and see if the packaging are in good condition
- Ask about refunds and replacement policies
- Ensure there is a warranty for electrical goods. Check on their post sales service as well
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