The English word for "輔助" in Chinese astrology is "auxiliary". Auxiliary is a term used to describe the specific role and function that each of the twelve zodiac signs play in someone's birth chart.

In astrology, each zodiac sign holds a specific energy or archetype that can help in understanding different aspects of one's personality, behavior, and life experiences. The auxiliary of a sign refers to the secondary energy or characteristic that compliments and enhances the primary energy of the sign.

For example, Aries is known for their bold and assertive nature, but their auxiliary sign, Libra, brings balance and harmony to their personality. Taurus is known for their practical and materialistic approach to life, but their auxiliary sign, Scorpio, brings depth and emotional intensity. Each sign's auxiliary provides a valuable counterpoint to the primary energy of the sign, giving insight into how to better balance and navigate life's challenges.

Knowing your auxiliary sign can also be helpful in understanding your compatibility with other signs. Signs with complementary auxiliaries often work well together, while those with conflicting auxiliaries may encounter more challenges in their relationships.

In addition to the individual significance of each auxiliary, there are also three modalities or groups of zodiac signs that share similar auxiliary energies. These modalities are the cardinal signs (Aries, Cancer, Libra, and Capricorn), the fixed signs (Taurus, Leo, Scorpio, and Aquarius), and the mutable signs (Gemini, Virgo, Sagittarius, and Pisces).

Understanding the significance of each sign's auxiliary and their modality can provide a deeper understanding of one's birth chart and one's overall personality and life experiences. It can also be helpful in identifying areas for personal growth and development.