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+++ b/docs/document/level-1/routing-lv1-part1.md
@@ -6,7 +6,7 @@
 
 要理解路由，就要理解完整的路由功能需要有三兄弟来合力完成：1. **入站**；2. **路由**；3. **出站**。
 
-![路由三兄弟](./routing-lv1-img01-trio.png)
+![路由三兄弟](./routing-lv1-img01-trio.jpg)
 
 三兄弟桃园结义，不求同年同月同日生，但求同年同月同日死。
 
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index cd7fc3a..d2c4fe1 100644
--- a/docs/en/document/level-1/routing-lv1-part1.md
+++ b/docs/en/document/level-1/routing-lv1-part1.md
@@ -6,7 +6,7 @@
 
 要理解路由，就要理解完整的路由功能需要有三兄弟来合力完成：1. **入站**；2. **路由**；3. **出站**。
 
-![路由三兄弟](./routing-lv1-img01-trio.png)
+![路由三兄弟](./routing-lv1-img01-trio.jpg)
 
 三兄弟桃园结义，不求同年同月同日生，但求同年同月同日死。
 
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diff --git a/docs/ru/document/level-1/routing-lv1-part1.md b/docs/ru/document/level-1/routing-lv1-part1.md
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--- a/docs/ru/document/level-1/routing-lv1-part1.md
+++ b/docs/ru/document/level-1/routing-lv1-part1.md
@@ -6,7 +6,7 @@
 
 Чтобы понять маршрутизацию, нужно понимать, что для ее полноценной работы нужны три компонента: 1. **входящий трафик** (inbound); 2. **маршрутизация** (routing); 3. **исходящий трафик** (outbound).
 
-![Три брата-маршрутизатора](./routing-lv1-img01-trio.png)
+![Три брата-маршрутизатора](./routing-lv1-img01-trio.jpg)
 
 Три брата, поклявшиеся в верности, не обязательно родились в один день, но должны быть готовы умереть в один день.
 
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