Male, a deputy general at the northwestern frontier military camp. Xiao Chi's grandson Wu You was sent to find him before the mad horse incident occurred. However, it was Deputy General Meng who was searching everywhere for Wu You rather than the other way around, a discrepancy noted by Sima Qing as suspicious. The child also referred to him as 'Uncle Mengwei' when Xiao Chi told him to go find him for milk.
