Hěnduō lǎorén yīnwèi xiāngxìn le bǎojiànpǐn guǎnggào ér shàngdàng shòupiàn.
Many elderly people are cheated because they believe ads for health supplements.
Tips
usage
上当 is falling for a trick and 受骗 being deceived; together they make the standard phrase of fraud warnings, as on notices reading 谨防上当受骗 "beware of scams".