The revolutionary mass line is closely related with the class line.
The class line is a prerequisite to the mass line and the latter is based on the former.
Interests of popular masses are represented by working class and can be materialized only under the leadership of the working class. Nature of working-class party can be maintained and the party can perform its historic mission only when the mass line and the class line are implemented by combining them closely.
It is necessary to implement the mass line correctly while adhering firmly to the class line. Only then, is it possible to isolate thoroughly the hostile factors, consolidate the class position, educate and remould them to unite and make them display highly the creativity in the revolution and construction.
It is imperative not to make the Rightist deviations while abandoning the class line to implement the mass line or not to make the Leftist deviations while violating the mass line to defend the class line.