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About Success Day (Cheng Ri 成日) in Chinese Almanac Tong Shu

Originally asked as: "About Success Day (Cheng Ri 成日)"

Ming
Question Date: 11/10/2025

In the Chinese Almanac (Tong Shu), is a Success Day always suitable for use? Can I use it for my business opening?


Thank you


Peter Yap
Date Answered: 16/10/2025 

Is a Success Day always good for business openings?

Not necessarily.

A Success Day (成日) is generally favorable for activities that aim for achievement, progress, or completion. It's good for things like signing contracts, launching projects, or making announcements.

But Here's the Catch

  • Need to check with the Dong Gong date selection that has been implemented in our Tong Shu.
  • Success Days are general indicators — they don’t account for:
    • Your personal BaZi (Four Pillars) compatibility
    • The specific activity (e.g., opening a shop vs. launching a website)
    • The location’s Feng Shui
    • Some Success Days may clash with your BaZi, or fall on a month breaker, which weakens their effect.

For Business Openings

You must choose a day with Wealth, Opening, or Establishment energies that support your BaZi — especially your Useful Ten Gods (喜用神).

Warmest Regards


Ming
Follow-up Date: 19/10/2025 

I appreciate the detailed clarification.


Thank you

Thank you for reading our BaZi and Feng Shui: Questions and Answers: "About Success Day (Cheng Ri 成日) in Chinese Almanac Tong Shu"

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