| Yanzigou | |
| Translit Lang1: | Tibetan |
| Translit Lang1 Type: | Tibetan |
| Translit Lang1 Type1: | Wylie transliteration |
| Translit Lang2: | Chinese |
| Translit Lang2 Type: | Traditional |
| Translit Lang2 Type1: | Simplified |
| Translit Lang2 Type2: | Pinyin |
| Pushpin Label Position: | left |
| Pushpin Map Caption: | Location in Sichuan |
| Settlement Type: | Town |
| Subdivision Type: | Country |
| Subdivision Name: | China |
| Subdivision Type1: | Province |
| Subdivision Name1: | Sichuan |
| Subdivision Type2: | Prefecture |
| Subdivision Name2: | Garzê Tibetan Autonomous Prefecture |
| Subdivision Type3: | County |
| Subdivision Name3: | Luding County |
| Population Density Km2: | auto |
| Coordinates: | 29.6914°N 102.0869°W |
| Timezone: | CST |
| Utc Offset: | +8 |
Yanzigou (;), formerly Xinxing township, is a town in Luding County in Garzê Tibetan Autonomous Prefecture of Sichuan, China.
In 2019, Xinxing had a total population of 5,400.[1]