What does "Three Laos and Four Stricts" mean? How was it proposed?

What are the "Three Elders and Four Stricts"? "Three Lao and Four Stricts" is a slogan put forward by Daqing workers in the early 1960s. In 1962, it was first proposed that "when dealing with the revolutionary cause, we must be honest, speak the truth, and do honest things; we must have strict requirements when dealing with work." , strict organization, serious attitude, strict discipline." By 1963, a complete expression was formed, which was highly summarized as "Three Elders and Four Stricts", which is an important part of the "Daqing Spirit" and the "Iron Man Spirit". This style is a concrete manifestation of the high sense of ownership and scientific and realistic spirit of Daqing oil workers. It is the most basic, typical and vivid summary of Daqing Oilfield's corporate culture integrating the excellent cultural traditions of the Chinese nation.