Group 1 - Recent reports indicate concerns over the quality of gold bars sold by banks, with claims of impurities found inside the bars [1] - Banks typically rely on visual inspection, weight verification, and certificate validation for repurchasing gold bars, which may not effectively detect internal adulteration [2] - The rapid increase in gold prices has led to a rise in bank repurchase volumes, exposing potential industry pitfalls, such as stringent repurchase conditions and hidden fees [2] Group 2 - Consumers are advised to purchase gold from certified channels, retain complete packaging and purchase receipts, and use basic testing methods to identify potential issues [3] - The industry needs to enhance transparency and regulatory oversight to rebuild trust, including implementing stricter quality traceability systems for gold bars [3]