Fire is divided into: fire in the furnace, fire on the mountain, thunderbolt fire, fire under the mountain, Buddha lamp and fire in the sky. Skyfire and thunderfire are the fiercest. Thunderstorm fire is not only afraid of water, but also can dive into the bottom of the sea. Although the thunderbolt is full, it is better to have happy water to manage it, especially Tianhe.
In ancient times, Yin Na's five elements were used for marriage. It was better to be born in the same year, but worse to be born in the same year.
If you don't know, you can look for it. This book is very detailed.