
Unfortunately, Chinese history of the Three Kingdoms period don't contain any reference to fighting monks, unliked the Sengoku Jidai in Japan, so adding warrior monks to the game would be nonsensical at best. You could have monks that specialise with long weapons (Spear, Staff), short weapons (Sword, Knife), or even unarmed fighting styles.
The Warrior Monks would have various fighting styles that depend on the region that they were recruited from.
Since Shogun 2 had Warrior Monk units, why shouldn't China have Warrior Monks as well? As usual for a Glass Cannon, they would be units with high melee attack and melee defence but have expensive recruitment and upkeep, high vulnerability to arrows due to lack of armour, and require certain technologies and infrastructure.