The previous outer realm war had shown Chu Zheng the techniques of the Confucian Daoist Monks through the Shadow Retention Wall that Geng Yiyang brought back.
Bai Nian had no Taoist orthodoxy or guide, yet he was able to cultivate the Vast Righteous Qi within himself without a teacher, which indicated he possessed a certain talent.
"Are you willing to leave the Cangyun Realm?"
After pondering, Chu Zheng asked Bai Nian for his own thoughts; this was a journey Bai Nian had to undertake on his own, and it was naturally up to him to decide.
Bai Nian lacked the Immortal Bone, had only average martial talent, and within the Cangyun Realm, the path of Confucianism was impracticable.
Given the current situation, heading to the Myriad Realms was the best option for Bai Nian; at least there he would have access to the Confucian School's teachings, listen to the wisdom of sages, and could make further progress, officially embarking on the path of cultivation.