Someone from Reddit posted this.
Additionally, my humble suggestions from a Chinese history buff.
Jurchen: All good.
Kitanguts: Probably good to keep it purely Tanguts. The UU and Castle assets are already there.
Wei: Shift the Liaodao UU to the renamed Xianbei/Khitan. For context, Liao Dao is Liao Dynasty blade in Mandarin. May have to tag Tiger Calvary as campaign only or reassign it to OG Chinese.
Shu: Agree to rename to Bai/Nanzhao/Dali. Historically, Shu enlisted many natives from the surrounding Bashu, Guizhou and Yunnan regions. For ROTK fanboys, Nanman is the predecessors of Nanzhao–Dali. The White feather guard can be renamed to something generic, like the Dali guards. If this approach is taken, the Dev would probably have to add some colours by introducing some UU to reflect this.
A lazy and convenient one would be the fleet-footed Rattan Shields from AOE3, replacing the War Chariot. Chariots became irrelevant during Medieval China and it has no place in the hilly and mountainous terrain of Southwestern China. The base model can be modified from the Vietnamese Rattan Archers UU.
https://historum.com/t/about-the-rattan-armor.182984/
Wu: This is a bit tacky. Suggest to rename it as Jiangnan Chinese. Minyue or Wuyue seems too distant into the past. Historically, the centre of Imperial power always revolved around the Central Plains until the 5 Barbarians 五胡乱华 period, which caused the Imperial court to move South. In the process, 2 distinct sets of culture evolved, with the Jiangnan Chinese being more commercial and more naval oriented. Much of the Silk, Porcelain and Tea were exported via the Maritime Silk Route from modern day Jiangsu, Hangzhou and Fujian.
Jian Swordsman and Fire Archers are generic enough units, with the latter based on Huolongjing 火龙经 and Wujing Zongyao 武经总要 so it’s all good from an immersion perspective.
OG Chinese: The OG Chinese could represent Chinese from the Central Plans 中原 and Yellow River regions, which still represents Chinese Political and Military power till this day. Maybe to reassign the Tiger Calvary from the current Wei lineup to it and receive some rebalancing to the Calvary line?
Note to the Dev, if you are reading. Ripping off Koei Dynasty Warrior won’t impress the Chinese. In fact, many Chinese are already offended by how their cultures are being misrepresented by the Japanese through the Dynasty Warriors series.