conversant with things present and past
Chinese idiom, Pinyin is t ō NGJ ī nd á g ǔ, which means to describe knowledgeable, the same as "knowledgeable". From preface.
The origin of Idioms
Hu Yunyu's Preface: "in describing the differences of schools and the gains and losses of politics, there is a talent who can understand the present and the past, but not a magnificent and magnificent pen. There is no writing in words, and the practice is not far away."
Idiom usage
Used as a predicate or attributive; used in writing.
conversant with things present and past
so poor as to have no room to stick an awl on - sheng wu li zhui