Has anyone seen Fengyun 2? The dragon is the second dream. Whose child is it?

Dragon Father is a man who has been pursuing fencing all his life. When the dragon's mother was pregnant, because they were chased by the enemy, the dragon's father and mother separated. Later, because Dragon's father did some bad things in his life, he was willing to be locked up in that temple. It was not until later Longzi went there to recognize him that he passed on what he had learned all his life to Longzi and then died.

Longzi was adopted by Ermeng at a very young age and then raised.