Jiuye refers to the nine provinces of ancient China.
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history
From 《吕氏春秋·有始览》: the heavens were divided into 九野 — 钧天 (center), 苍天 (east), 变天 (northeast), 玄天 (north), 幽天 (northwest), 颢天 (west), 朱天 (southwest), 炎天 (south), 阳天 (southeast). Mirrors the 九州 division of the earth below.