Yanamino秀才不出门，全知天下事
xiù cai bù chū mén , quán zhī tiān xià shìxiucaibuchumen,quanzhitianxiashi
- a learned person need not leave his home to know what's going on in the world (idiom)
Data from JMdict, KANJIDIC2 (EDRDG), KanjiVG, CC-CEDICT and Make Me a Hanzi. Sources and licences