Yi Jing
Yi Jing (The Book of Changes) is an ancient classic expounding the changes of the universe and everything in it. It is also an enigmatic philosophical treatise on dialectics. The original Yi Jing consists of three volumes, but only one of them – Zhou Yi – is extant today, which, as legend has it, stems from the eight trigrams drawn by Fuxi based on Hetu and Luoshu.
Yi Jing records a complete set of profound astrological reasoning developed by the ancient Chinese through the observation of the universe and covers a wide range of subjects including philosophy, politics, life, literature, arts, and science. In remote ancient times, the Chinese people formulated such concepts as tiangan (Heavenly Stems) and dizhi (Earthly Branches), yin and yang, five elements, and bagua by observing the movement of celestial bodies. Based on that, they developed a systematic worldview that explained all beings in the universe and all changes in human society according to the principle of unity of the opposites, such as yin and yang, qian (heaven) and kun (earth), and hardness and softness. The book reflects how the ancient Chinese understood the perpetual changes of the universe, reveals its features and traits, and depicts how everything between heaven and earth evolves.
Regarded as the first of all classics in Chinese history, Yi Jing is held in high esteem by the ancient statesmen, military strategists, scholars, and businessmen alike as the theoretical root for the natural philosophy and cultural practices contained in traditional Chinese thinking. Through constant evolution and improvement, the ideas expressed in the book have become a philosophy. It explains the rule of living followed by the Chinese known as "man is an integral part of nature" and gives birth to the spirit of the Chinese nation – striving continuously for self-improvement and caring for all things with ample virtue.
《易經》
《易經》是闡述天地世間萬象變化的古老經典，也是博大精深的辯證法哲學書。《易經》包括《連山》《歸藏》《周易》三部經書，其中《連山》《歸藏》已經失傳，現存于世的只有《周易》。相傳伏羲根據河圖洛書畫成八卦，即為《周易》之來源。
《易經》記錄了中國古人探索宇宙奧秘，并由此演繹出的一套完整深奧的星象推理文化，內容涉及哲學、政治、生活、文學、藝術、科學等諸多領域。上古時期，中國古人觀察天象，確定天干地支、陰陽五行、八卦原理，結合時空、陰陽觀念，發展成為一個系統的世界觀，用陰陽、乾坤、剛柔的對立統一來解釋宇宙萬物和人類社會的一切變化。《易經》反映了中國古人對宇宙萬物時刻變化的認識，揭示了宇宙的特性，囊括了天地間萬物的發展屬性。
在中國歷史上，《易經》被譽為諸經之首，是中國傳統思想文化中自然哲學與人文實踐的理論根源，為古代政治家、軍事家、學者、商業家所推崇。經過不斷演繹，《易經》已成為一門哲學，描述了中國人遵循的一種“天人合一”自然生存法則，并孕育了中華民族自強不息、厚德載物的民族精神。
