In BaZi astrology, the concept of "Ten-Year Major Luck" is an important one, referring to the changes in a person’s fortune during specific time periods throughout their life. By analyzing these ten-year periods, we can predict the luck and misfortune in each phase, offering guidance for various aspects of life, career, relationships, and more.

1. What is Ten-Year Major Luck?

Ten-Year Major Luck is calculated based on the year and month pillars in the BaZi chart. It is derived by observing the flow of the five elements (wood, fire, earth, metal, water) and the Yin-Yang relationships between the Heavenly Stems and Earthly Branches. Each ten-year period has its own unique combination of Heavenly Stems and Earthly Branches, which represent the changes in one's fortune during that phase.

Characteristics:

• Each cycle lasts for ten years.
• The Heavenly Stems mainly influence external circumstances, while the Earthly Branches reflect internal changes.
• A new combination of Heavenly Stems and Earthly Branches is assigned every ten years, beginning at a specific time after birth.

Classics mention: "Fortune flows like water, originating from the root of the destiny, stimulating good and bad in one's life," which indicates that Major Luck is closely tied to one’s BaZi chart.

2. How is Major Luck Calculated?

The start of Major Luck is determined based on the Heavenly Stems and Earthly Branches of the birth time. Different astrologers may use slightly different methods, but generally, the calculation follows these factors:

• The Heavenly Stems and Earthly Branches of the year, month, day, and time of birth.
• Gender, as the direction of the start of Major Luck differs for men and women.
• The difference between "virtual age" and actual age, with Major Luck typically starting in the 6th or 8th year after birth.

1.1 Virtual Age and Actual Age:

• Virtual age refers to the age calculated based on the birth year, typically one year older than the actual age. For example, if someone is born in December 2020, their virtual age in 2021 will be 2 years.
• Actual age is the person's real age, calculated based on the time of birth.

1.2 Basic Rules for Starting Major Luck:

• Major Luck usually begins at a certain age after birth, commonly the 6th or 8th year.
• The starting age is determined by the Heavenly Stems, Earthly Branches, and the person's gender.
• In BaZi, since the Heavenly Stems and Earthly Branches belong to Yin-Yang attributes, the starting of Major Luck for a Yang male (male) and Yin female (female) is typically direct, whereas for Yin male (male) and Yang female (female), it is reversed.

3. How to Determine the Starting Time of Major Luck Based on Heavenly Stems and Earthly Branches?

3.1 Determining Gender and Sequence of Major Luck:

• Yang males (males) and Yin females (females) have their Major Luck starting in a direct order, meaning it follows the sequence of Heavenly Stems and Earthly Branches starting from the 6th or 8th year.
• Yin males (males) and Yang females (females) have their Major Luck starting in reverse order, meaning it follows the sequence in reverse starting from the 6th year after birth.

3.2 Yin-Yang Attributes of Heavenly Stems and Earthly Branches:

• Yang Heavenly Stems: Jia, Bing, Wu, Geng, Ren
• Yin Heavenly Stems: Yi, Ding, Ji, Xin, Gui
• Yang Earthly Branches: Zi, Yin, Chen, Wu, Shen, Xu
• Yin Earthly Branches: Chou, Mao, Si, Wei, You, Hai

For a Yang male and Yin female, Major Luck starts directly following the order of Heavenly Stems and Earthly Branches from the 6th year of life.

4. How to Calculate the Starting Point of Major Luck?

Suppose someone is born in the Ren Yin year, and their gender is Yang male. Here's how to calculate the start of their Major Luck:

Example: Start of Major Luck for a Yang male born in the Ren Yin Year:

Suppose this person is born in the Ren Yin year, specifically on May 12, 2022 (virtual age 1), and their gender is Yang male. How would we calculate their start of Major Luck based on this information?

Step 1: Determine the Heavenly Stems and Earthly Branches of the birth year:

• Heavenly Stem: Ren
• Earthly Branch: Yin

Step 2: Determine the starting time of Major Luck:

• For a Yang male, Major Luck typically starts at the 6th year after birth. Therefore, Major Luck begins at age 6.
• The specific starting point is determined by the Heavenly Stems and Earthly Branches of the birth time.

Step 3: Calculate the Major Luck's sequence of Heavenly Stems and Earthly Branches: Since the person is a Yang male, Major Luck flows in a direct order, following the sequence of Heavenly Stems and Earthly Branches. The first Major Luck starts with Bing Wu. The sequence is as follows:

• First Major Luck: Starts at age 6, with Heavenly Stem Bing and Earthly Branch Wu, i.e., Bing Wu Major Luck.
• Second Major Luck: Starts at age 16, with Heavenly Stem Ding and Earthly Branch Wei, i.e., Ding Wei Major Luck.
• Third Major Luck: Starts at age 26, with Heavenly Stem Wu and Earthly Branch Shen, i.e., Wu Shen Major Luck. And so on, with each new cycle occurring every 10 years.

Conclusion: If this Yang male was born on May 12, 2022 (virtual age 1), his first Major Luck will begin at age 6 (i.e., in 2028), with the Heavenly Stem Bing and Earthly Branch Wu.

Formula for calculating the start of Major Luck: Starting Year = Birth Year + Virtual Age at Starting Time - 1
The Heavenly Stem and Earthly Branch of Major Luck are calculated from this year onward, following the direct or reverse sequence.

5. Differences Between Direct and Reverse Calculation

• Direct calculation: The Major Luck is calculated by following the sequence of the Heavenly Stems and Earthly Branches, applicable to Yang males and Yin females.
• Reverse calculation: The Major Luck is calculated by following the reverse sequence of the Heavenly Stems and Earthly Branches, applicable to Yin males and Yang females.

6. Using a BaZi Calculation Tool for Major Luck

In modern astrology, many BaZi calculation tools are available to help quickly and accurately compute Major Luck, along with detailed astrological analysis. These tools automatically generate a BaZi chart by inputting the birth year, month, day, and time, analyzing the Five Elements, Heavenly Stems, Earthly Branches, and predicting the specific periods of Major Luck.

One popular online tool is Shen-Shu.com. It uses precise algorithms to calculate Major Luck and provides detailed predictions for good and bad fortune, career, wealth, marriage, and health based on each period.

Advantages of Shen-Shu.com BaZi Calculation Tool:

• Fast calculations: The tool quickly calculates accurate Major Luck data.
• Detailed analysis: In addition to Major Luck, the tool provides a complete BaZi analysis, including Five Elements, Ten Gods, and trend analysis.
• User-friendly: Whether you are new to astrology or a seasoned practitioner, Shen-Shu.com is easy to use, with an intuitive interface.

How to use Shen-Shu BaZi Calculation Tool:

1. Visit the Shen-Shu website (shen-shu.com).
2. Enter your birth year, month, day, and time in the calculation tool.
3. Click "Calculate" to generate your BaZi chart and see Major Luck analysis.

With this tool, you can quickly understand the starting point of your Major Luck and gain deep insights into the shifts in your fortune throughout each ten-year period. This allows for wiser decisions and adjustments in your life.

Whether you wish to understand your career prospects or predict changes in your Major Luck, using Shen-Shu.com can provide valuable guidance.

3. The Impact of Major Periods on Destiny

In BaZi (Four Pillars of Destiny) astrology, the Major Periods (Da Yun) are like a flowing river, and our BaZi chart is like a boat. The five elements of the Major Periods directly affect the balance of the five elements in the chart, determining whether the boat sails smoothly with the current or struggles against it. Therefore, the fortune of the Major Period is mainly reflected in whether it can help balance the five elements in the BaZi chart.

What is a Prosperous Period (Wang Yun)?

A prosperous period refers to a Major Period where the five elements can complement the deficiencies in the BaZi chart, balance the elements, and make life smoother with more opportunities.

Judgment Method:

1. Check the Balance of the Five Elements in Your BaZi: Use a chart tool (like ShenShu) to calculate your BaZi, and see which elements are strong (too much) or weak (too little) in your chart.
2. Match with the Five Elements of the Major Period: If the five elements of the Major Period can supplement the missing elements in your chart or reduce the overly strong elements, this is a prosperous period. For example: If your BaZi has too much fire, and the Major Period brings water, it can "control" the fire and help balance the elements.

What is a Declining Period (Chui Yun)?

A declining period refers to a Major Period where the five elements disrupt the balance of the BaZi chart, making the strong stronger and the weak weaker, thus bringing trouble and challenges.

Judgment Method:

If the five elements of the Major Period further strengthen the already overly strong elements in the BaZi chart ("adding fuel to the fire"), or weaken the already weak elements ("adding insult to injury"), it is a declining period. For example: If your BaZi has a weak water element, and the Major Period brings more fire, the water is further "controlled" by the fire, leading to bad fortune.

Manifestations of Prosperous and Declining Periods

Three Simple Steps to Identify a Prosperous or Declining Period!

1. Identify the Required Elements in Your BaZi: Use a chart tool to find the favorable (lucky) and unfavorable (unlucky) elements in your chart. The lucky elements are those you need, and their presence indicates a prosperous period; the unlucky elements are those you don't need, and their presence indicates a declining period.

2. Check the Five Elements of the Major Period: Each Major Period consists of a Heavenly Stem and an Earthly Branch. Find out the corresponding five elements, for example:

   • The Heavenly Stem Jia represents wood, and the Earthly Branch Yin also represents wood, so this is a wood period.
   • If wood is your lucky element, this period will be prosperous; if wood is your unlucky element, it will be a declining period.

3. Verify with Real-Life Experience:

   • During a prosperous period: You usually feel lucky, with many opportunities, smooth career development, and a stable life.
   • During a declining period: You may feel increased pressure, things don't go smoothly, and your health may decline.

Summary: How to Quickly Determine a Prosperous or Declining Period?

1. Use a chart tool to find the lucky and unlucky elements in your BaZi.
2. Compare the five elements of the current Major Period and see if they help (prosperous period) or harm (declining period) your BaZi chart.
3. Observe how things go in real life—prosperous periods are smooth, while declining periods are obstructed.

For example: If your BaZi favors wood, and the Earthly Branch of the current Major Period is Yin (wood), then it is a prosperous period. If your BaZi dislikes wood, and the Major Period brings Yin (wood), it may be a declining period.

4. Classical and Practical Analysis of the Great Luck Period

In classical Ba Zi (Eight Characters) astrology, the Great Luck Period is considered the "trigger" for the auspicious and inauspicious aspects of a person's life. The natal chart is the foundation of a person’s fate, given by the heavens, while the Great Luck Period serves as a catalyst for later life events, influencing a person’s success, wealth, poverty, longevity, and health.

The Importance of the Great Luck Period in Classical Literature:

📖 "Di Tian Sui"
"The Great Luck Period is the pivot of the natal chart, and the flow of fortune is like moving water, where good and bad are determined by the interaction of the five elements."
This indicates that the natal chart is static, while the Great Luck Period is dynamic. Regardless of whether the natal chart indicates wealth or poverty, only by considering the changes of the five elements during the Great Luck Period can one truly understand the direction of their destiny.

📖 "Yuan Hai Zi Ping"
"The Great Luck Period’s alignment of Yin and Yang affects success, failure, longevity, and fate; if the luck is unfavorable, it is like a withered tree that cannot grow."
This emphasizes the significant role of the Great Luck Period in determining success and failure: if the five elements of the Great Luck Period nourish or harmonize with the natal chart, life will proceed smoothly; conversely, if the Great Luck Period disrupts the balance of the natal chart, life will encounter obstacles.

📖 "Qiong Tong Bao Jian"
"Luck follows the cycle of the five elements, and understanding its subtle changes can give one a deep understanding of the principles of fate."
This suggests that the relationship between the Great Luck Period and the natal chart is like the cyclical changes of the five elements—if one can grasp the nuances, they can generally understand the patterns of fate.

Practical Analysis of the Great Luck Period:
In practice, the Ba Zi natal chart provides a static map of a person’s fate throughout their life, while the Great Luck Period is a dynamic timeline that determines the ups and downs of each stage. For example, a person whose natal chart suggests wealth may find their fortune delayed or interrupted during an unfavorable Great Luck Period, while someone with an ordinary natal chart may experience temporary success during a favorable Great Luck Period.

5. How to Use the Great Luck Period to Plan Your Life? 🌟

The ultimate goal of analyzing the Great Luck Period is to help us plan our lives more effectively. By combining the natal chart and the Great Luck Period, we can find the path that suits us best, avoid misfortunes, and seize opportunities.

1. Understand the Requirements of the Natal Chart:

What is the Natal Chart?
The natal chart is based on the year, month, day, and time of birth, using the Heavenly Stems and Earthly Branches to form the Four Pillars of Destiny (Ba Zi). It shows the distribution of the five elements throughout one’s life, their personality traits, career prospects, and more.

How to Identify the Needs of the Natal Chart?
Using a Ba Zi charting tool (such as ShenShu Ba Zi chart), one can quickly calculate the strengths and weaknesses of the five elements in the natal chart, identify the favorable and unfavorable elements, and find the lucky elements (beneficial to the chart) and the harmful ones.
Example:

• If the natal chart lacks water, it indicates that water is a lucky element, and the luck periods involving water can benefit career and wealth.
• If the chart has too much fire, and fire is an unfavorable element, a period of fire luck may bring issues in career or health.

2. Match the Five Elements of the Great Luck Period:

By analyzing the Heavenly Stems and Earthly Branches of the Great Luck Period, one can determine how the elements in this period interact with the natal chart:

• Favorable Luck: The five elements of the Great Luck Period can supplement deficiencies in the natal chart, helping to balance the five elements and improve fortune.
  Example: If the natal chart shows weak wood and the Great Luck Period involves the Earthly Branch of Yin Wood, it is a favorable period that helps career development.

• Unfavorable Luck: The five elements of the Great Luck Period further disrupt the balance of the natal chart, leading to adverse situations.
  Example: If the natal chart has an excess of earth, and the Great Luck Period involves the Stem of Wu Earth, the excessive earth element may cause health or financial problems.

3. Develop Specific Strategies:

4. Practical Case Analysis:

Case 1: Natal Chart Shows Weak Fire, Fire is Favorable
Natal Chart Analysis: The individual’s chart has weak fire, leading to slow career development and a reserved personality that causes missed opportunities.
Great Luck Period Analysis: The 30-40 age period is the Bing Wu period (Fire), with a strong fire element.
Strategy: During this period, the individual should seize opportunities, take initiative, and explore entrepreneurial or career expansion possibilities.

Case 2: Natal Chart Shows Strong Earth, Earth is Unfavorable
Natal Chart Analysis: The individual has too much earth in their chart, which makes them stubborn and prone to digestive health problems.
Great Luck Period Analysis: The 40-50 age period is the Wu Xu period (Earth), further increasing the earth element, which could cause health problems.
Strategy: Reduce work stress, focus on health management, especially diet adjustments, and avoid overworking to prevent illness.

6. Conclusion

The Great Luck Period, lasting ten years, is like a life compass, with each period shaping the direction of the future. By studying Ba Zi astrology and correctly interpreting the Great Luck Period, we can achieve the following:

• Understand the strengths and weaknesses of the five elements in the natal chart, and identify key moments in life;
• Match each Great Luck Period’s elements and assess the fortune or misfortune of each stage;
• Create a clear life plan: seize opportunities during favorable periods and avoid risks during unfavorable periods.

🔮 Classic Wisdom Inspires Us:
"The Great Luck Period cannot be reversed, but we can align ourselves with it." Only by understanding the laws of the natal chart and the Great Luck Period can we resolve unfavorable elements in life and use favorable periods to elevate ourselves.

With the help of modern astrological tools like Shen-Shu.com, these complex theories can be simplified, providing scientific guidance and advice for your future planning.