Luo Xing, the ancestor of the Nine Realms and an even greater forefather than the Heavenly Dao, somehow fell from the heavens to the mortal world and became a dragon egg. Zhang Qiling, fresh out of the Bronze Gate, found him by chance and named him Zhang Qingwu.
Before Zhang Qingwu loses his temper:
Demon Emperor: ...Hey, little ancestor, you ate my demon ore for thirty thousand years. Why are you acting like my son now?
Demon Emperor: Little ancestor, give me back my Myriad Demon Hall!
Hades: Little ancestor, give me back my River of No Return!
Asura King: My black iron pillar!
After Zhang Qingwu loses his temper:
The four big shots instantly go quiet as mice.
Wu Xie and the others: ??? What is this? A one-year-old little ancestor has beaten all these big shots into submission?
Zhang Qiling, sipping tea: Relax, relax. No need to panic.