Is it safe to pay with a barcode scanner at supermarkets? Decrypting the security mechanisms behind barcode paymentWe often use WeChat or Alipay to scan and pay when shopping at supermarkets. Cashiers scan our QR codes with a barcode scanner, but some people are concerned: Is the barcode scanner safe? Can it be used to make payments without entering a password, and are there any security risks? Today, we'll learn more about the security mechanisms behind barcode payments to address your concerns...

Mysterious flying world: why do large planes avoid the sky over Xizang? In the early summer morning, the sun shines through the clouds on the northern Tibetan plateau, creating brilliant colors and magnificent scenery. However, the towering of the the Himalayas has brought great challenges to pilots...