氦 气 + 亥 气 Part qì steam 亥 Part hài twelfth earthly branch Appears in characters like: 氧 氪 氯 氢 氨 氮 氟 汽 氦 氩 氡 氚 氖 氛 忾 氙 氰 氕 氘 氜 氝 氠 氥 芞
