Compatibility for two Dragon signs
Friction
The Dragon is the branch 辰, Yang Earth. When both people share it, the two branches are identical. Here is what the tables say about that.
Two people born in the Year of the Dragon share one branch, and 辰 is a self-punishing branch, so the tables add one friction mark: the same strengths and the same stubborn spots twice.
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Branches: 辰 and 辰
Same sign
Same sign, same branch. People who share a sign often say they get each other’s rhythm without explaining. The flip side is sharing the same blind spots.
Punishment (刑)Friction
辰 is one of the four signs that rub against themselves (自刑: 辰, 午, 酉, 亥), so two people born in the Year of the Dragon count as a rubbing pair in the tables. It is read as being hard on yourselves in the same way. Taking turns being the easygoing one tends to help.
Elements: Earth and Earth
Both signs are Earth. Same-element pairs tend to understand each other quickly, and also to compete or mirror each other’s habits.
Both branches are Yang.
How to read this
A zodiac sign is one character out of eight in a saju chart. For two people, the birth-day pairs, the balance of elements and timing usually say more than the signs do. Treat this page as a tendency, for fun and self-reflection, not a verdict on anyone.

A sign is just one character
Two full charts have sixteen. Enter your birthday, then theirs, and the Moon Rabbit works out your compatibility score for free, on your device.
Questions
Are two people born in the Year of the Dragon compatible?
Two people born in the Year of the Dragon share one branch, and 辰 is a self-punishing branch, so the tables add one friction mark: the same strengths and the same stubborn spots twice. It is one character each, so treat it as a tendency. The full charts of both people say more.
Which signs are traditionally closest to the Dragon?
By the tables, the Dragon’s closest partner (six harmony) is the Rooster and its three-sign teammates are the Monkey and Rat.
Is zodiac compatibility the same as saju compatibility?
No. Zodiac compatibility compares only the two birth-year signs. Saju compatibility compares both full charts, especially the birth-day pairs and how the elements fill each other in. SajuBunny shows that score for free.