As an Internet buzzword, the word "double label" here refers to double standards.
Therefore, the term is usually used to make complaints about two items or items with different yardsticks, or different criteria for people, such as different standards for themselves and others. People who are more demanding of others than themselves. This word has been used as a catchphrase for a long time. In the earliest catchphrase rice circle, it is often used as a common phrase to fight among different fan groups. Later, it gradually became well known to the public, and its scope of use gradually expanded. It has become a common internet language. (shuangbiao deyisai Wang Lao Yong Yu)