Aromatic Sleep Therapy: A Comparative Review of Er Su Jiu Ju and E Li Zhang Zhong Xiang

Introduction

In recent years, traditional Chinese incense formulas have gained renewed attention for their potential to enhance sleep quality. Two notable examples are Er Su Jiu Ju (二苏旧局，”The Su Brothers’ Old Formula”) and E Li Zhang Zhong Xiang (鹅梨帐中香，”Goose Pear Incense for the Canopy”). Rooted in historical records and modern adaptations, these incenses blend natural ingredients to create unique aromatic experiences. This review examines their composition, sleep-promoting mechanisms, and real-world efficacy based on user feedback and scientific insights.

Historical Context and Composition

Er Su Jiu Ju

Named after the literary brothers Su Shi and Su Zhe, this incense reflects the scholarly aesthetics of the Song Dynasty. Its core ingredients include agarwood (沉香), sandalwood (檀香), frankincense (乳香), amber (琥珀), and jasmine (茉莉)34. The formula emphasizes a balanced woody-sweet aroma, with agarwood providing depth and sandalwood adding warmth. Modern versions often incorporate honey or essential oils to enhance fragrance retention3.

E Li Zhang Zhong Xiang

Originating from the Southern Tang Dynasty, this incense is tied to Emperor Li Yu’s love for his consort Zhou Ehuang. The traditional recipe uses goose pear juice, agarwood, and sandalwood, steamed to infuse the fruit’s sweetness into the woody base413. Contemporary adaptations, such as those by intangible cultural heritage inheritor Gao Qing, replace extinct goose pears with quince (榅桲) for a mellower, fruit-forward scent213.

Aromatic Profiles and Sleep Mechanisms

Er Su Jiu Ju: Woody Tranquility

The blend’s dominant agarwood contains sesquiterpenes like α- and β-pinene, which inhibit central nervous system activity, reducing anxiety and promoting relaxation59. Sandalwood’s santalol further calms the mind by stimulating the limbic system, while amber and jasmine add floral undertones that enhance emotional well-being311. Users describe its scent as “refreshing yet grounding,” ideal for unwinding after stress14.

E Li Zhang Zhong Xiang: Sweet Serenity

The combination of quince-derived fructose and agarwood creates a sweet, honeyed aroma. Fructose’s mild sedative effect, combined with agarwood’s polyphenols, may improve sleep architecture by increasing slow-wave sleep511. The fruit-forward notes are often perceived as “comforting” and “romantic,” making it popular for evening rituals1421.

Real-World Efficacy and User Feedback

Er Su Jiu Ju

• Sleep Quality: Users report reduced restlessness and faster 入睡 with its woody aroma. One reviewer noted, “The scent lingers subtly, helping me stay asleep through the night”14.
• Relaxation: Its calming properties make it suitable for pre-sleep meditation. However, some find its intensity overwhelming if used in small spaces14.

E Li Zhang Zhong Xiang

• Anxiety Relief: The sweet, fruity scent is praised for alleviating bedtime anxiety. A customer stated, “It feels like a warm hug, easing my racing thoughts”114.
• Practicality: Line incense versions burn evenly with minimal smoke, ideal for bedrooms1. However, solid perfume versions have shorter 留香时间，requiring reapplication1421.

Safety and Considerations

Both incenses are generally safe when derived from natural ingredients. However:

1. Synthetic vs. Natural: Synthetic versions may contain irritants like phthalates, while natural blends (e.g., those by 迦印堂) prioritize botanical purity1617.
2. Allergies: Individuals sensitive to woods or flowers should test small quantities first.
3. Usage Tips: Avoid burning in poorly ventilated rooms. For sleep, limit use to 30–60 minutes before bedtime1011.

Conclusion

Er Su Jiu Ju and E Li Zhang Zhong Xiang offer distinct aromatic pathways to better sleep. The former excels in deep relaxation through woody, earthy tones, while the latter soothes with sweet, fruity notes. While scientific studies on these specific blends are limited, their ingredients align with aromatherapy principles supported by research1011. For optimal results, choose natural formulations and experiment with usage timing and intensity. As part of a holistic sleep routine, these incenses can transform bedtime into a sensory journey of calm.