qǔ​qí​jīng​huá, qù​qí​zāo​pò

critical assimilation

取其精华,去其糟粕 (取其精華,去其糟粕) qǔ​qí​jīng​huá, qù​qí​zāo​pò
critical assimilation
the principle of not accepting foreign ideas uncritically during the process of national modernization
selective refinement
to take the essence and discard the dross; to keep what is good and reject the rest
selective study
the requirement to be selective and critical when studying or acquiring new knowledge

Sources

Definitions
CC-CEDICT