diff --git a/people/shihai4h/page.en.md b/people/shihai4h/page.en.md
index f143fdcd..e05350b4 100644
--- a/people/shihai4h/page.en.md
+++ b/people/shihai4h/page.en.md
@@ -8,8 +8,8 @@ info:
 ## Description
 
 <PhotoScroll photos={[
-'${path}/photos/photo1.jpg',
-'${path}/photos/photo2.jpg',
+'${path}/photos/photo1.webp',
+'${path}/photos/photo2.webp',
 ]} />
 
 Shihai was a naive girl who preferred to stand by the window, gazing into the distance and losing in thought, just like her favourite QQ avators.
@@ -18,7 +18,7 @@ In that state, she won't notice you if you walk close to her quietly.
 The first time I met her in real life, I (The author of this entry) was immediately attracted by her gloomy temperament just like Lin Tai-yu in *A Dream of Red Mansions*.
 
 <PhotoScroll photos={[
-'${path}/photos/photo3.jpg',
+'${path}/photos/photo3.webp',
 ]} />
 
 (The preceding photo is Shihai measuring her height)
diff --git a/people/shihai4h/page.md b/people/shihai4h/page.md
index bd43846c..9b65c832 100644
--- a/people/shihai4h/page.md
+++ b/people/shihai4h/page.md
@@ -8,14 +8,14 @@ info:
 ## 简介
 
 <PhotoScroll photos={[
-'${path}/photos/photo1.jpg',
-'${path}/photos/photo2.jpg',
+'${path}/photos/photo1.webp',
+'${path}/photos/photo2.webp',
 ]} />
 
 就和她喜欢用的 QQ 头像一样，柿海是个喜欢站在窗户边然后眺望远方发呆的傻傻的姑娘，即使轻轻走近也不易被察觉，初见时，我就被她身上那种林妹妹似阴郁的气质吸引了。
 
 <PhotoScroll photos={[
-'${path}/photos/photo3.jpg',
+'${path}/photos/photo3.webp',
 ]} />
 （柿海在量身高的照片）
 
diff --git a/people/shihai4h/page.zh_hant.md b/people/shihai4h/page.zh_hant.md
index 8d7f9c97..a36c4240 100644
--- a/people/shihai4h/page.zh_hant.md
+++ b/people/shihai4h/page.zh_hant.md
@@ -8,14 +8,14 @@ info:
 ## 簡介
 
 <PhotoScroll photos={[
-'${path}/photos/photo1.jpg',
-'${path}/photos/photo2.jpg',
+'${path}/photos/photo1.webp',
+'${path}/photos/photo2.webp',
 ]} />
 
 就和她喜歡用的 QQ 頭貼一樣，柿海是個喜歡站在窗戶邊然後眺望遠方發呆的傻傻的姑娘，即使輕輕走近也不易被察覺，初見時，我就被她身上那種林妹妹似陰鬱的氣質吸引了。
 
 <PhotoScroll photos={[
-'${path}/photos/photo3.jpg',
+'${path}/photos/photo3.webp',
 ]} />
 （柿海在測量身高時的照片）
 
diff --git a/people/shihai4h/photos/photo1.jpg b/people/shihai4h/photos/photo1.jpg
deleted file mode 100644
index b8f587e9..00000000
Binary files a/people/shihai4h/photos/photo1.jpg and /dev/null differ
diff --git a/people/shihai4h/photos/photo1.webp b/people/shihai4h/photos/photo1.webp
new file mode 100644
index 00000000..e141ac7d
Binary files /dev/null and b/people/shihai4h/photos/photo1.webp differ
diff --git a/people/shihai4h/photos/photo2.jpg b/people/shihai4h/photos/photo2.jpg
deleted file mode 100644
index 51628ba0..00000000
Binary files a/people/shihai4h/photos/photo2.jpg and /dev/null differ
diff --git a/people/shihai4h/photos/photo2.webp b/people/shihai4h/photos/photo2.webp
new file mode 100644
index 00000000..32fdcf8f
Binary files /dev/null and b/people/shihai4h/photos/photo2.webp differ
diff --git a/people/shihai4h/photos/photo3.jpg b/people/shihai4h/photos/photo3.jpg
deleted file mode 100644
index 91289a3a..00000000
Binary files a/people/shihai4h/photos/photo3.jpg and /dev/null differ
diff --git a/people/shihai4h/photos/photo3.webp b/people/shihai4h/photos/photo3.webp
new file mode 100644
index 00000000..0fbe16a6
Binary files /dev/null and b/people/shihai4h/photos/photo3.webp differ