He's the first person BXC meets in the sect as a best friend and as a brother. He teaches Bai Xiaochun the ways of the Ovens, smuggling food away from the elders.
The truth was that his latent talent was only average; if it weren’t for the deep connections between his family and his Master, he would never have been admitted into the Spirit Stream Sect.
It was only because of the precious materials back in the Ovens that he’d been able to cultivate to the great circle of the third level of Qi Condensation.
He is forced to join the Outer Sect with Bai Xiaochun and Third Fatty Hei after he is pushed by Li Qinghou in the Qualification Race.
After joining the Outer Sect, he had no such precious materials, and thus found cultivation to be very difficult. He could only watch as Third Fatty Hei and Bai Xiaochun both surpassed him, and although he was happy for them, he was very disappointed in himself.
He turned out to be talented in spirit enhancement, the joy he felt was unimaginable. He tries to show off to Xiaochun, but fails every enhancement. Xiaochun tricks him into believing that he actually succeeded, which actually strengthened Dahai's spirit enhancement skills.
He goes to the Starry Sky Dao Polarity Sect with Bai Xiaochun, and leaves and returns.
He is taken into the Eternal Lands by the Ghostmother, where he is highly valued for his spirit enhancement skills.