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A unique numerical string is assigned by Alipay to identify an Alipay barcode. The string starts with a number between 25 to 30, and has 16 to 24 digits.

每个支付宝条码都与一个唯一的数字字符串配对，该字符串必须实时从用户的支付宝钱包中读取。字符串以25到30之间的数字开头，有16到24位数字。使用此规则，您可以区分支付宝条码与其他条码。