What does the Dragon King mean?

Meaning: Dragon King (a character in myths and legends)

dragon

[English] [? Doctor? g？ N][ America] [? Doctor? ɡ? n]

Dragon, dragon boat; [D-] [astronomy] Tianlong (constellation); [Spoken, derogatory] A person with a bad temper;

king

[English] [k? ] [America] [k? ]

King; Old k (in cards) and king (in chess); king ...

Make ... the king;

Giant;

The Dragon King is the king who commands the Shui people in the water according to the myths and legends of the Han nationality, and is in charge of the nebula rainfall, belonging to one of the Four Spirits. Legend has it that dragons can spread clouds and rain, eliminate disasters and reduce happiness, symbolizing good luck, so it is a custom for Han people all over the country to dance dragons to pray for peace and harvest.

example sentence

The Dragon King decided to disguise himself as an old man to seek medical help.

So the dragon king disguised himself as an old man and went out for medical treatment.