Visiting the four townships and five islands of Lienchiang County in Fujian Province of the Republic of China—better known as the Matsu archipelago—besides the magnificent sea-eroded cliff landscapes and the enchanting blue tears, the most soulful representative is undoubtedly the mellow, sweet Matsu kaoliang.
While visiting the Nangan Distillery, an old employee quietly shared an insider tip with me: “If you really understand liquor and want to drink the most fragrant and clean baijiu, you must make a trip to Dongyin!”
That sentence ignited my curiosity. I then boarded the Tai-Ma Ferry and bumped northward to Dongyin Island, the northern frontier of the nation. Upon arrival, I excitedly asked the homestay owner how to visit the Dongyin Distillery, but the owner smiled and waved: “Dongyin Distillery’s production capacity is tight—it’s mainly a production area, and there aren’t many tourist routes! If you want to buy authentic good liquor, just walk to any of the old grocery stores in Zhongliu Village or Lehua Village downtown and you can buy the real thing. Each bottle only earns the store about NT$35 in meager delivery fees—truly a public-sale-friendly price!”
After deep conversations with local specialty shops, veteran drinkers, and the distillery promotion center veterans, I finally solved the ultimate puzzle that has confused many liquor lovers for years: What are the essential differences between the “daqu,” “daqu,” “aged kaoliang,” and “ordinary kaoliang” on the market?
1. Starting from the Distillation Kettle: What Are “Liquor Head” and “Daqu”?
Kaoliang liquor brewing emphasizes solid-state fermentation and low-temperature distillation. When the fermented kaoliang raw material is heated in a distillation kettle, the liquor turns into steam as the temperature rises, then condenses and flows out through a cooling pipe.
During this distillation process, the alcohol concentration changes very regularly:
- The first drops of raw liquor: The alcohol content is highest, with the freshly flowing liquid reaching 78% to 80% ABV.
- As distillation time lengthens: The proportion of water vapor gradually increases, and the alcohol concentration of the flowing liquid slides downward.
In brewing terminology, the premium liquor collected from the highest 78 proof down to 63 proof is collectively called the “liquor head.”
The “liquor head” is the most precious and aroma-concentrated core of the entire distillation batch. It is rich in aromatic esters with an intense, full-bodied taste—this is what people commonly call “daqu liquor.” After initial aging and blending with aged liquor, the traditional daqu liquor sold in the early market usually ranged between 66 and 68 proof, fierce on entry with a deep, lingering finish.
2. Why Was “59.5-Proof Daqu” Born? The Mysterious 0.5-Degree Regulatory Secret
If traditional daqu liquor is 66–68 proof, then where did the “59.5-proof Dongyin Daqu” commonly seen on modern shelves come from? Is it just a random blend?
Mr. Hsieh Ting-shih, team leader of the Dongyin Distillery Promotion Center, unraveled this interesting historical background for us:
To break the sales deadlock, the distillery veterans exercised great wisdom: precisely diluting the originally fierce liquor-head daqu raw liquor to 59.5 proof!
Team Leader Hsieh explained that 59.5 proof is an extremely clever golden balance point:
- Fully preserving aroma: 59.5 proof is still very high, enough to firmly lock in daqu’s original rich, mellow compound grain aroma and high-ester flavor, with no reduction in the sweet aftertaste;
- Avoiding hazardous-goods restrictions: Sitting just below the 60-proof legal red line, it can be legally and safely displayed in major stores and duty-free shops, and logistics delivery proceeds smoothly;
- Renamed “daqu”: To distinguish it from the traditional undiluted 66-proof-plus “daqu,” the distillery changed the bottle label to the two characters “daqu.”
This precious “0.5-degree difference” is a classic masterpiece combining brewing craftsmanship and commercial wisdom.
3. The Kaoliang Family Tree: Full Analysis of Four Major Terms and Specifications
With the distillation proof and legal background clarified, we can clearly map out the complete spectrum of the kaoliang family:
| Product Name | Core Alcohol Content (ABV) | Brewing and Aging Features | Flavor Profile |
|---|---|---|---|
| Daqu Liquor | 66–68 proof | The premium “liquor head” from 78° to 63° during distillation, extremely limited output. | Bold and intense, explosive, full-bodied—the favorite of connoisseurs. |
| Daqu | 59.5 proof | Liquor head precisely reduced in proof to comply with the under-60-proof non-hazardous display rules. | Perfectly preserves daqu’s rich grain aroma, slightly less pungent, round and easy to drink. |
| Ordinary Kaoliang | 40–63 proof (commonly 42°, 58°) | The middle-cut liquor after collecting the liquor head, blended in proportions. | Clear and refreshing, sweet and pure—suitable for gatherings and meals. |
| Aged Kaoliang (Chen Kao) | Usually 45–50 proof | Carefully selected premium |
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