From 《
周易·
兑卦》 (Book of Changes, Dui hexagram):
丽泽,
兑。
君子以朋友讲习。Two adjoining marshes (
丽泽 'paired marshes') replenish each other — the gentleman therefore studies and discusses with friends. This classical sense gave its name to many academies and place names. In modern Beijing,
丽泽 names a major business district in
丰台 (Fengtai), often called 'Beijing's third financial center' alongside
金融街 and CBD.