Customer Support
Learn how to fully utilize the 8Letters system and find answers to frequently asked questions.
1. Complete Guide to Using the 8Letters System
Q. How should I ask questions to get the most accurate answers from 8Letters AI?
8Letters is not just a simple chatbot but a 'high-precision destiny simulator.' Your questions act as queries that explore the internal database, so the more specific your situation and clear your goals, the exponentially higher the resolution of the analysis.
❌ Bad example: "How's my wealth luck this year?"
✅ Good example: "I'm currently a 5-year experienced developer in the IT industry. I'm considering switching to a startup or starting my own business in the second half of this year. Analyze my career luck flow in my Saju and tell me when is the least risky and most advantageous."
Q. What is the difference between 'Easy Mode' and 'Pro Mode'?
You can choose between two modes based on your level of Saju knowledge and the desired depth of analysis.
- Easy Mode: Explains the core fortune flow in simple, everyday language. Recommended for beginners who are unfamiliar with Saju terminology.
- Pro Mode: Provides in-depth analysis along with professional Saju terminology (Gyeokguk, Yongsin, Sinsal, etc.). All analysis tools such as cross-verification, expert clinical data, and classical archives are activated by default.
You can switch modes at any time using the buttons at the top during a conversation.
Q. What is the thinking level and how do I adjust it?
In the right panel (Settings), you can adjust the AI's computational depth from level 1 to level 5. The higher the level, the stronger the AI's logical reasoning and complex pattern analysis capabilities, yielding more precise results. For light daily advice, use a low level; for major life decisions (marriage, business, job change, etc.), a high level is recommended. However, higher levels consume more credits.
Q. What are the functions of the tools (Cross-Verification, Classical Archive, Expert Mode)?
These are three powerful extension tools that complement AI analysis.
- Cross-Verification: Performs analysis based on an integrated database of approximately 17,600 Eastern and Western cases, providing unbiased objective insights.
- Classical Archive: References all eight major classical texts on destiny, including Yeonhae-Japyeong and Sammyeong-Tonghoe, to add fundamental interpretations.
- Expert Mode: Trained on 11,844 cases of top 1% expert real consultations and clinical data, it provides realistic and intuitive solutions beyond theory.
Q. How do I use the system instruction?
This feature allows you to force the AI's tone and manner (speaking style) or a specific persona. Click 'System Instruction' in the right panel to write and save your own instructions. For example, you can set it to "Answer like a close friend using casual speech" or "Explain like a professional metaphysician mixing in Chinese characters."
Q. How do I modify my Saju information (profile)?
You can modify your profile via the 'Profile Selection' menu in the right panel or from the `[Settings] > [Membership] > [Mailing]` page. If your birth date/time changes, the existing analysis cache is immediately discarded, and new Natal Chart data including Heavenly Stems, Earthly Branches, Hidden Stems, 12 Stages of Life, and Symbolic Stars are recalculated through the core calculation engine.
Q. Can I also see compatibility (multi-person analysis) with family or partners?
Yes, 8Letters supports simultaneous multi-profile analysis. In the 'Profile Selection' panel on the right, check (activate) additional profiles of family, partners, or business partners besides yourself, then ask a question in the chat. The AI will load the Natal Charts of all active individuals simultaneously and precisely simulate interactions (Combination, Clash, Destruction, Harm, etc.).
Q. What is the Daily Saju Newsletter (Mailing Service)?
It is a subscription service that delivers a precise daily Saju flow, changing every 2 hours, via email without needing to access a complex app. It combines the results of the basic core calculation engine with the AI interpretation engine (with optional cross-verification, expert mode, and classical archive) to provide the most intuitive and easy-to-understand report. You can manage subscription and option settings on the `[Settings] > [Membership] > [Mailing]` page.
Q. What are the email sending times and first receipt timing?
The mailing service sends emails daily according to the time set by the user. However, the first email sending time may vary depending on the subscription (payment approval) time and the set time.
- If the set time is after the current time: The first email will be sent today at that time.
- If the set time is before the current time: Today's sending time has already passed, so the first email will be sent tomorrow at that time. (Example: If you subscribe at 11 PM and set the sending time to '00:00', the first email will be sent at midnight (tomorrow 00:00), one hour later.)
💡 Reception Options Guide
- Same-day fortune: The fortune is analyzed based on the date the email is sent (today).
- Next-day fortune (received previous day): The fortune is analyzed based on the day after the email is sent (tomorrow). Recommended for those who prefer to check the next day's fortune the night before rather than preparing early in the morning.
2. The Critical Difference Between General AI and 8Letters AI
Q. Why are the results always wrong when I ask general AI about Saju?
General large language models like Claude or ChatGPT are merely text generators that 'understand context and predict the next word'; they do not have an internal Manse Calendar engine for Saju calculations. This leads to the following critical limitations.
- Inability to calculate in real time: Even if you input your Saju Natal Chart at the beginning of the conversation, the AI cannot calculate 'today's fortune' or 'the flow of a specific date.' Without a 'date engine' to extract the changing energy of time at every moment, it ends up writing baseless fiction as the conversation continues.
- Errors in Luck Pillars and Solar Terms: It fails to calculate the forward/backward movement of Luck Pillars based on gender and Yin-Yang, or the minute-by-minute boundaries of Solar Terms, often getting the basic starting point of the Natal Chart wrong.
- Hallucination phenomenon: It invents Symbolic Stars with no basis in classical metaphysics, or adds plausible interpretations based on incorrect calculation results, delivering false information to users.
Q. How did 8Letters solve this problem?
8Letters never leaves Saju 'calculation' to the AI. Instead, it has built a hybrid system where a 'high-precision Manse Calendar engine' performs all calculations, and the AI is solely responsible for 'interpretation.'
Built-in High-Precision Engine
Through a 'real-time date calculation logic' that general AI lacks, it instantly calculates the energy of all dates and times within a 200-year range with zero error.
Zero-Hallucination Data Injection
Before the AI answers, it injects 100% accurate Luck Pillars, Annual Pillars, and Daily Pillar data calculated by the engine, fundamentally eliminating any room for the AI to 'guess.'
In other words, 8Letters is a professional analysis solution on a different level from general AI services, combining a calculation engine with astronomical precision and the AI's excellent natural language interpretation ability.
3. Scope and Depth of Manse Calendar Analysis Information
Q. Does it contain 'all data' for 100 years?
Yes, it does. But it is not simply 'stored' data; it is in the form of a 'real-time calculation engine.'
- Our system mathematically and perfectly calculates the Heavenly Stems and Earthly Branches of every second, minute, hour, day, month, and year from 1900 to 2100.
- Once your birth date and time are set, the Luck Pillars, Annual Pillars, Monthly Pillars, and daily pillar information for the next 100 years are instantly generated from that moment.
Q. What specific information is included?
It is not just characters like "It's a Gapja day, it's an Eulchuk day." The data for each day includes all of the following information.
- Four Pillars: The Stem-Branch composition of that date
- Ten Gods: The correlation between you (Day Master) and the energy of that date (wealth luck, career luck, resource luck, etc.)
- 12 Stages of Life: The strength and energy flow of that energy
- Symbolic Stars: Special interactions such as Heavenly Virtue, White Tiger, etc.
Q. How does AI utilize this vast amount of information?
If we feed all 100 years of daily data to the AI at once, it causes information overload (noise). That's why we use the 'Smart Extraction' method.
- When a user asks, "What's my fortune for next year?" → The AI focuses on analyzing the Annual Pillar data for the upcoming year.
- When a user says, "Pick a good date for an important contract this month" → The AI retrieves the daily cycle data for the 30 days of the current month and selects the day with the most favorable energy.
- In other words, all 100 years of data are prepared, and the AI extracts and analyzes only the necessary parts like tweezers, tailored to the topic of consultation.
💡 In summary:
Once your character (Saju) is generated, think of it as having all the weather maps from birth to death already drawn within our system. External information collected from the web combines with this Manse Calendar data, allowing the AI to provide hyper-personalized analysis that goes beyond simple fortune-telling.
Q. How is 8Letters' time calculation different from ordinary saju apps? (True Solar Time & Global Timezone Auto-Detection)
The time in Saju astrology is not the mean solar time shown by clocks, but the True Solar Time, which takes the moment the actual sun is overhead (due south) as noon (午時) as the absolute standard. The 8Letters engine adopts a Dual Correction Engine that dynamically integrates astronomical orbital equations and geographic coordinates — rather than a one-size-fits-all offset that only works for one specific region.
① Local Longitude Correction
Every timezone is defined by a standard meridian, but your birth city is rarely right on that line. For example, New York (EST) follows 75°W, yet Manhattan sits at 74°W — a difference that shifts the true solar noon. 8Letters pinpoints your birth city's exact longitude and corrects the time down to the second, so your Hour Pillar reflects where you actually were born, not where the timezone says you are.
② Equation of Time Correction
The Earth orbits the sun in an ellipse with a tilted axis, causing the sun's apparent motion speed to vary by season (date). 8Letters incorporates the solar declination and equation of time algorithms used by NASA JPL Ephemeris (DE431) and NOAA to perfectly correct orbital errors that can reach up to +16 minutes in winter and -14 minutes in spring.
③ Global Timezone Auto-Detection
No matter where you were born — New York, London, Sydney, Tokyo, or anywhere worldwide — simply selecting your birth city lets the system automatically detect your local UTC offset (EST/PST, GMT/BST, JST, etc.) and whether Daylight Saving Time (DST) is in effect. Regional timekeeping quirks — from Korea's traditional 30-minute shift to summer time adjustments across Europe and North America — are all handled automatically, so you get the most accurate Hour Pillar calculation for your actual location.
💡 Conclusion: A difference of just one minute can change the 'Hour Pillar (時柱)', which determines a quarter of one's life. 8Letters combines the depth of traditional astrology with the precision of modern astronomy to produce the most accurate natal chart.
4. Customer Support
For technical errors, payment and refund inquiries, and account-related issues encountered while using the 8Letters system, please contact us via the official support email below. Our engineering team will promptly review and respond.
Customer Support Email:
⚠️ Caution
We do not respond to personal interpretation requests for saju analysis results or fortune-related questions via this email. Please use the 8Letters AI chat for such inquiries.