Before painting the barren hills with green paint

The first sentence is to insert new branches into dead trees.

Painting barren hills with green paint is a slogan against formalism. The original sentence is that the dead trees are planted with new branches, and the barren hills are painted with green paint, which means that they talk about their demands and actually do nothing.

Formalism refers to a way of thinking and work style that only looks at the phenomenon of things without analyzing their essence. It violates the scientific principle that content determines form, form serves content, and content and form are unified.