Kaiyuan may refer to:
- Kaiyuan, Liaoning, city in Liaoning, China
- Kaiyuan, Yunnan, city in Yunnan, China
- Kaiyuan District, a former district of Xiamen City, Fujian Province. Kaiyuan ( Simplified Chinese:开原市 Pinyin: Kāiyuán is a County-level city of Tieling City Liaoning Province People's Kaiyuan (开远 Pinyin: Kāiyuǎn is a city within Honghe Hani and Yi Autonomous Prefecture in Yunnan province China. Kaiyuan (開元 is a region in Xiamen Municipality and a former district that now belongs to Siming District.
- Kaiyuan era, the early half of the reign of Emperor Xuanzong of Tang, China. Emperor Xuanzong of Tang ( ( September 8, 685 Background Li Longji was born at the Tang Dynasty eastern capital Luoyang
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