Numbers already attached to you — birth date, phone, plate, unit, floor — read for the trigrams and elements each digit carries, and for the sequences the classics treat as draining.
The Later Heaven arrangement gives every digit from one to nine a trigram, a direction and an element. Numbers are read the way palaces are read in Feng Shui, because they are the same nine positions.
Practice reads a string two digits at a time. A pair carries a combination — production, control, or reinforcement — and the last pair of a number carries the most weight because it is where the sequence lands.
Only where you have a choice: a phone number, a plate, a unit, a bank account, a wedding date. Numbers you cannot change are read for context, not corrected.
Enter any number — phone, plate, unit, account — and a birth date. The reader reduces the string to its root, breaks it into pairs, and names the element each digit carries.
Digit elements follow the Later Heaven bagua numbers, the same mapping used for flying stars. Traditions differ; a reading that contradicts your Bazi should follow the Bazi.