Prompt: 关键词提取： 1. 乾 (Qián): • Three yang lines • Symbolizes heaven, creation, strength 2. 坤 (Kūn): • Three yin lines • Represents earth, receptivity, stability 3. 震 (Zhèn): • One yang line above two yin lines • Symbol of thunder, dynamism, stimulation 4. 巽 (Xùn): • Two yang lines above one yin line • Symbolizes wind, adaptability, gentleness 5. 坎 (Kǎn): • One yang line above one yin line • Represents water, flow, insight 6. 艮 (Gèn): • One yin line above one yang line • Symbolizes mountain, stillness, firmness 7. 离 (Lí): • Two yin lines above one yang line • Represents fire, illumination, passion 8. 兑 (Duì): • Two yang lines above one yin line • Symbol of lake, communication, harmony