So, again, why a China-based faction when we already have the Khuzait? Their stuffs are almost the same. I thought I already mentioned this?
Actually not, Chinese are not nomadic people and usually heavily infantry based, Chinese excels in city/town siege warfare, the Han empire relies on heavily fortified infantry each time they expedite north to meet the XiongNu, on the battlefield however, the face offs are usually the chinese infantry's ability to hold formation to survive the horse archers (and often contingents of archers to counter the HA) and charge to rout the enemy infantry while holding against their calvary. when they charge, it at times involves dropping off their shields and swords in opt for more polearm based weapons presumably for stamina and endurance for the melee.
What the ancient Chinese armies are good at is their ability to fortify with makeshift camps each time they settle by the end of the day, it's like a mobile fortress. The downside is that supply line and foraging is challenging for heavily agricultural based society compared to the nomadic tribes.
it is truly astounding that however, China's interaction with the central asia city states whom mostly are remnants of the Hellenic Alexandar Empire mixed with nomadic tribes (who are better representation of the Khuzaits IMHO), usually results in that actual siege and conquest battles are not challenging, as a matter of fact, a very high proportion of casualties are due to the supply line issues across the GoBi desert, whether they got lost, or ill prepared. but many a times, the Han Empire would have send a very small contingent of troops and rather, use their governors in the so called Xi Yu (West Domain) to conscript other city states to provide the troops. There are many occasion that the Chinese expedition would simply siege or face off enemies in those places without conscripting allied city states, even when the odds are overwhelmingly against the Expedition, the Han forces still many a times come out triumphant. Of course there are also lame generals who can't lead and lost many a battles against those city states...(李廣利 for example), but the overall picture is up until later Han, those city states don't pose a challenge to the Chinese military.
Situation were not so different in the midst of Tang Dynasty, which is around 8~9 Century. But the Tang Dynasty was very well in a good hegemony position over the central asia states who became fewer kingdoms and khanates often owning several cities/towns each instead of individul city states. At least the hegemoney continued until roughly when the civil war started by 安祿山 (of whom, also is a central Asia origin and not Chinese, he supposedly is a Kanju Sogdian, who I really like to think are the actual Khuzaits as 康居 sounds almost similar to Khergit in pronouciation and their location to be just close to the Caspian seas...)
Anyway, ancient Chinese ruling system are vastly different from the Medieval Europe, and it just cannot likely to coexist in the base game's mechanics.