diff --git a/rt-thread-version/rt-thread-standard/programming-manual/libc/figures/libc_structure.png b/rt-thread-version/rt-thread-standard/programming-manual/libc/figures/libc_structure.png
index 07da690e7c40c27a692cb2342cdea4b462d1a937..c93d1572df779d795f98737bab698c5dbef6b41c 100644
Binary files a/rt-thread-version/rt-thread-standard/programming-manual/libc/figures/libc_structure.png and b/rt-thread-version/rt-thread-standard/programming-manual/libc/figures/libc_structure.png differ
diff --git a/rt-thread-version/rt-thread-standard/programming-manual/libc/libc.md b/rt-thread-version/rt-thread-standard/programming-manual/libc/libc.md
index dd3562f2b2c354c4aa4f6c654631ab14aada240e..5c9992572bfa4c0b4be909c8d0339d508dbbdac7 100644
--- a/rt-thread-version/rt-thread-standard/programming-manual/libc/libc.md
+++ b/rt-thread-version/rt-thread-standard/programming-manual/libc/libc.md
@@ -2,9 +2,7 @@
 
 RT-Thread 提供的 Libc (C library, C库)，包含编译器配平层和 POSIX 层两部分。布局如下图所示：
 
-<img src="figures/libc_structure.png" alt="libc_structure" style="zoom: 25%;" />
-
-
+![libc_structure](figures/libc_structure.png)
 
 ## 1. 编译器配平层