Missing Chang'an

[A girl who is pretending to be dull but really smart and powerful VS a boy who is pretending to be cheerful and really sinister but whose identity is a mystery] [Excellent novel + ancient romance + suspense + case solving + reasoning + redemption] A strange murder case leads to a pair of strange brothers and sisters. Zhang Xiaoli pushed Zhang Shisi, who was unable to speak or move his legs, into Chang'an and made a death promise: if the case could not be solved within five days, he would be killed.