... of old Tsin) built a wall to keep off Ts'in, both Ngwei and Ts'u (which by this time was quite as good orthodox Chinese as any other state) treated Ts'in as though the latter were still barbarian, In 326 Ts'in first introduced into her realm the well-known year-end sacrifices of the orthodox Chinese, which fact alone points to a long isolation ... — Ancient China Simplified • Edward Harper Parker
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