Time Feng Jun's album card has an anti-counterfeiting logo called watermark. This is what official website in Time Feng Jun said. When distinguishing authenticity, take photos under the photo album card with purple light, and you will see a row of words similar to tnt. Due to the quality control problems in Li Fei, logo will be different, but there will be no obvious difference. If there is no watermark, the album card is fake.