The three-volume story in this book is based on the theme of "stripping and rebuilding identity" - from Shen Weiwan (actually Princess Beidi) struggling to survive in the palace wall, to becoming a sharp knife between the two countries after uncovering the truth about "baby swapping", and finally finding the "guardian" at Yumen Pass, an identity that transcends blood and power.
Xiao Che's role gradually changed from "the emperor controlling the chess game" to "a mortal with weaknesses". His relationship with Shen Weiwan finally found a longer-lasting form than "possession" in "the family and the country are together".
