Outside of Bai Ning, Qing Yi and Chun Hua also learnt about Zhao Ling breaking through to the Dao Seed Realm, but neither of them had the time to come over and watch the breakthrough, as they found themselves busy doing their own thing. Not feeling that watching Zhao Ling's breakthrough was that important, as they both felt that asking their master for guidance when the time came would be far more useful.
Not to mention, they understood that Zhao Ling would not be the only one to breakthrough to the Dao Seed Realm before they themselves had to think about breaking through to the Dao Seed Realm.
But that was not to say Bai Ning was the only of Xuan Hao's disciples to show up to watch Zhao Ling breakthrough to the Dao Seed Realm, as Mui, who had more than enough time to spare and generally driven by curiosity over what everyone was gathering for, had ended up also participating in watching Zhao Ling's breakthrough to the Dao Seed Realm.