Literature Reference: 《诗经·大雅·文王》：'文王在上，于昭于天。周虽旧邦，其命维新。有周不显，帝命不时。文王陟降，在帝左右。' 'King Wen is on high, shining brightly in the heavens. Though Zhou is an ancient state, its destiny is renewed. The glory of Zhou is not hidden; the decree of the Emperor is timely. King Wen ascends and descends, at the right hand of the Emperor.' From 'The Book of Songs, Da Ya, King Wen'.