I like Shang's development, there are tons of stories out there where the MC is kindhearthed, it is kinda refreshing to read this kind of change in his attitude.
(even though my hearth is bleeding sometimes)
man im just loving this even tho it may a bit sad you can tell how this world has exactly changed him from when he came to this world and when he became shang even to when he was taken from the kingdom to now