This is a popular saying during the Cultural Revolution. Among them, "outline" refers to class struggle as the key link, and "line" refers to line struggle. The so-called "going up the line" means looking at the problem from the perspective of class struggle and line struggle.

For example, farmers go to the market to buy and sell their own vegetables. Some people say that this is a capitalist road. That era was absurd, and so was this slogan.

Internet access is a way of thinking and discourse, which was very common during the Cultural Revolution. This method requires that people and things should not be viewed on the basis of facts, but the essence should be viewed through phenomena, and all problems should be raised to the height of major principles, that is, from the height of class struggle and line struggle, the question of who wins and who loses between proletariat and bourgeoisie, socialism and capitalism should be fundamentally analyzed, recognized and evaluated.

Abandon the principle of seeking truth from facts and advocate simplification and absoluteness. Now it is often used to satirize the behavior of raising the topic to the level of nationality, country and political position with the wrong thinking of landslide fallacy when talking about ordinary topics.