"Thankfully you're not the king of a country, or you'd be remembered as a king who would sacrifice everything for one person" ROFLOL
Poor guy doesn't know little Yuan Yuan is the heir of the whole Empire...
So based on some spoilers and tidbits here and there
since previous loop Chen Yuan was the one who sent MC back in time and is actually in love with MC, but because his cultivation technique prevents him from being able to feel and express his desire outward like his father, he can't develop their relationship outside of being rivals. The question is what's Chen Yuan's plan and why did he sent MC back in time.