Zhangzi County
长子县 Changtze | |
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 Faxing Temple | |
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| Country | People's Republic of China |
| Province | Shanxi |
| Prefecture-level city | Changzhi |
| Population (2020[1]) | 298,690 |
| Time zone | UTC+8 (China Standard) |
| Website | Zhangzi.gov.cn |
Zhangzi County (simplified Chinese: 长子县; traditional Chinese: 長子縣; pinyin: Zhǎngzǐ Xiàn) is a county in the southeast of Shanxi province, China. It is under the administration of the prefecture-level city of Changzhi.