Authenticating Old Versions of Renminbi: Common Features of the First, Second, and Third Series and When | Gu Jin Jian Bao

The quality of counterfeit old Renminbi has improved year by year—high-quality replicas of the first series can now deceive the naked eye of an ordinary collector. However, each series of Renminbi possesses unique anti-counterfeiting features, and counterfeit notes invariably leave clues in terms of paper quality, ink color, and watermarks. Below, we outline common methods for distinguishing fakes by series, along with advice on when professional grading by PMG is recommended.

First Series Renminbi: Key Identification Points of the Founding Currency

As the first currency series issued by the People's Republic of China, the first series holds extremely high collection value, making it a prime target for counterfeiters. Authenticity is primarily determined by the following points:

• Paper and Ink: Genuine notes mostly use thicker domestic paper, which feels soft and pliable with a fine texture. The ink color is stable, and under a magnifying glass, even fine lines appear clear without burrs. Counterfeit paper is often thin or stiff, with a rough feel. The ink may be shiny, discolored, or even fade.
• Watermark: Some denominations (such as the "Five Yuan" note) feature watermarks. Genuine watermarks are clear, with distinct layers, and the pattern is complete when held against the light. Counterfeit watermarks are usually blurry, the patterns are stiff, or they are merely "fake watermarks" printed on the surface of the paper.
• Serial Numbers and Codes: The serial numbers and codes on genuine notes are printed clearly, with consistent font size and spacing. Counterfeit notes may have blurry, unevenly thick or thin characters, or ink bleed/double images due to manual stamping.
• Hidden Marks: Many denominations of the first series feature unique hidden marks (e.g., small symbols or specific strokes concealed in certain patterns or text). These hidden marks are details of manual engraving, difficult to replicate perfectly, and serve as important clues for authentication.

Within the first series, the "Twelve Treasures" (e.g., "Herding Horses," "Yurt," "Zhande City") can fetch millions of Renminbi per note on the market. If you possess such rarities, it is recommended to consult a professional institution directly rather than attempting to assess them yourself. For a detailed value comparison by series, please refer to the First Series Renminbi "Twelve Treasures" Valuation Guide.

Second Series Renminbi: Anti-Counterfeiting Features of the Socialist Construction Period

While the anti-counterfeiting technology of the second series improved, counterfeiters still found loopholes. Pay attention to the following:

• National Emblem Watermark: The national emblem watermark on most second-series notes is clear and shows a distinct three-dimensional and layered effect when held against the light. Counterfeit national emblem watermarks may be blurry, flat, or merely simple outlines.
• Intaglio Printing: High-denomination notes (such as the "Big Black Ten," "Soviet Three Yuan," "Red Five Yuan") used intaglio printing. By touching the surface of the banknote, one can clearly feel the raised ink, especially on the portrait of Mao Zedong and the main design. Counterfeit notes are often flat-printed, smooth to the touch, and lack this three-dimensional feel.
• Paper Fibers: Genuine paper contains irregularly distributed red and blue fibers. Counterfeit notes may lack these entirely, or the fibers may be too regularly distributed or unnatural in color.
• Ink Color: Genuine ink is stable and resistant to fading. Counterfeit ink may be pale or bright, and may bleed over time.

Speaking of the second series, the "Big Black Ten" (1953 version 10 yuan) and "Soviet Three Yuan" (1953 version 3 yuan) are two names you must know—the former can fetch over HK$440,000 for a pristine single note, and the latter over HK$55,000. For detailed authentication points and 2026 market trends, please refer to the Big Black Ten, Soviet Three Yuan Collection Guide.

Third Series Renminbi: Longest in Circulation, Even Small Denominations Can Be Potential Growth Stocks

The Third Series Renminbi had the longest circulation period and a relatively large quantity still in existence, yet it contains high-value rarities (e.g., "Green Back Watermark 1 Jiao," "Jujube Red 1 Jiao"). For authentication, in addition to the common features mentioned above, also pay attention to:

• Watermark Diversity: The third series includes both fixed watermarks (five-star watermark, ancient coin watermark) and full-page watermarks. When authenticating, it's crucial to determine which type of watermark should be present for a specific denomination and then examine its clarity and three-dimensionality.
• Roman Numeral Serial Numbers: The serial numbers on the third series are a combination of Roman and Arabic numerals. Genuine notes have neatly arranged, evenly spaced, and clearly printed numbers. Counterfeit notes may have skewed characters, blurry printing, or incomplete numbers.
• Printing Quality: Genuine notes are finely printed, especially high-value denominations, with delicate patterns, smooth lines, and saturated colors. Counterfeit notes may have rough printing, distorted colors, or even visible dot patterns.
• Hidden Marks and Security Fibers: Some third series notes also have hidden marks or security fibers, which require careful comparison.

Regarding the storage environment for the third series (especially in Hong Kong's humid climate), you can refer to Practical Tips for Storing Third Series Renminbi.

Fourth Series and Banknote Condition: Don't Overlook the Variable of "Serial Numbers"

The most active part of the recent buyback market is actually the Fourth Series Renminbi—especially those with special serial numbers like 80100, 80100, and 902. For a detailed explanation of how different series and serial numbers affect value, please refer to theFourth Series Renminbi Collection Value Guide.

Additionally, the logic behind assessing banknote condition and serial numbers is another complex topic—for example, terms like "replacement notes," "repeater numbers," and "solid numbers" directly influence valuation. This content can be found in the Banknote Condition and Serial Numbers Collection Guide.

Some Cases Are Undetectable by Eye and Require Professional Authentication

Realistically, the authentication techniques discussed above can help you identify 90% of common circulation notes. However, the following cases are almost impossible to distinguish with the naked eye:

1. "Replacement Note" Forgery: Removing the serial number prefix from a common note and replacing it with that of a rare serial number. The alignment can be extremely precise, with seam traces only visible under UV light.
2. "Pressed" Treatment: A VF (Very Fine) note with creases is ironed flat to simulate an UNC (Uncirculated) note. PMG grading will apply a "Pressed" label, instantly halving its market value or more.
3. "Bleached" Treatment: Stains are lightened with chemicals, but the paper fibers are damaged, leading to a "Cleaned" label.
4. High-Quality Intaglio Forgery: In recent years, some workshops have been able to mimic a certain degree of raised ink. This requires a combined assessment with watermarks and security fibers.

In such situations, the safest approach is to consult an experienced authenticator, preferably in conjunction with opinions from PMG/PCGS graded holders.

Contact Information

Do you have idle old Renminbi, old Hong Kong dollars, silver coins, or stamps at home? Instead of letting them gather dust in a corner, let a professional team help you discover their true market value. Gukin Gemba offers free door-to-door appraisal services across Hong Kong Island, Kowloon, and the New Territories:

• WhatsApp / Phone: 98342057
• WeChat: john19998
• Services: Silver coins, old Hong Kong dollars, Renminbi, rare stamps, old gold, antique porcelain

Simply WhatsApp a photo of your collection for a free preliminary appraisal. Our experienced appraisers will personally inspect your items, ensuring confidentiality, transparency, and peace of mind. For more insights into the valuation logic for banknote Buyback, please refer to this category page.