Wǎngshàng yǒu hěnduō miǎnfèi de kùpèng kěyǐ xiàzài.
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酷碰 is a phonetic loan ('cou-pon') used mainly in Taiwan-influenced internet writing. The mainland-standard word is 优惠券. 优惠券 will be understood everywhere; 酷碰 sounds informal and trendy.
