Douluo: I am a peerless demigod, and I accept Qian Renxue as my disciple!

Su Bai traveled to Douluo Continent and cultivated himself to become a demigod, and the disciple-taking system finally arrived.
What should you do first after getting the system?
Accept Xiaoxue as your disciple and kill the father and son of the Tang family!
Let Xiaoxue's light shine on every piece of land in Douluo Continent!