At epi 14 currently. I am not clear about Shiyi's a purpose/ goal - like what is her raison d'etre at this stage?…
You missed the point of why he was asked to mentor her. It was a political move by her Uncle to make sure the Cui's had ties to the Nanchen Prince since the Palace was playing games with her marriage. That is, not putting all of ones eggs into a single basket. The mentoring was just an excuse. No one actually expected serious mentoring. If that makes sense
The Gods gave him someone he fell in love with and he took care of her without calling this "Love". This is beautiful.😔