The true qi and true essence in novels were fictional concepts that had nothing to do with the real world. True Qi was a mysterious type of energy that could be cultivated and was also known as Reiki. In some novels, zhenqi was described as a kind of energy with life force. It could be used to enhance one's strength through cultivation and absorption of natural elements. True Qi had various types and attributes. Some could attack enemies, some could heal wounds, and some could improve a character's physique and endurance. True essence was a mysterious substance that was usually described as an energy body formed by the soul. In some novels, true essence was described as a substance with life force. It could be used to strengthen one's strength through cultivation and absorbing soul energy. True essence had various types and attributes. Some could attack enemies, some could increase a character's ability and speed, and some could control enemies and items. It was important to note that true qi and true essence were fictional concepts that had nothing to do with the real world. In novels, they can be used to describe the abilities and emotions of characters but should not be regarded as real existences.