Kong Xiang recalled some information Primordial Sango had revealed to him in the past.
"The Reincarnation Dao and the Yin-Yang Dao were your primary daos, I think," Kong Xiang said, "Why?"
"The way the Limit Art of Transcendence works," Master Lin explained, "is to fix one's primary daos as the foundation and 'feed' more daos to it to nurture it. So, I need to be careful what dao I use as my first foundation, so I won't regret later when I regain my memories."
"Since you majored in those daos in the past, it's best to chose those same daos," Kong Xiang analyzed. "That way, even the slightest resonance could effectively boost your chances of your own consciousness coming out on top."