diff --git a/doc/demo01_hello/bilibili/22.png b/doc/demo01_hello/bilibili/22.png
deleted file mode 100644
index 887bc68..0000000
Binary files a/doc/demo01_hello/bilibili/22.png and /dev/null differ
diff --git a/doc/demo01_hello/bilibili/22.png.import b/doc/demo01_hello/bilibili/22.png.import
deleted file mode 100644
index e9a6d70..0000000
--- a/doc/demo01_hello/bilibili/22.png.import
+++ /dev/null
@@ -1,34 +0,0 @@
-[remap]
-
-importer="texture"
-type="StreamTexture"
-path="res://.import/22.png-cf972feae368717936686117d49775f7.stex"
-metadata={
-"vram_texture": false
-}
-
-[deps]
-
-source_file="res://doc/demo01_hello/bilibili/22.png"
-dest_files=[ "res://.import/22.png-cf972feae368717936686117d49775f7.stex" ]
-
-[params]
-
-compress/mode=0
-compress/lossy_quality=0.7
-compress/hdr_mode=0
-compress/bptc_ldr=0
-compress/normal_map=0
-flags/repeat=0
-flags/filter=true
-flags/mipmaps=false
-flags/anisotropic=false
-flags/srgb=2
-process/fix_alpha_border=true
-process/premult_alpha=false
-process/HDR_as_SRGB=false
-process/invert_color=false
-stream=false
-size_limit=0
-detect_3d=true
-svg/scale=1.0
diff --git a/doc/demo01_hello/bilibili/边框.png b/doc/demo01_hello/bilibili/边框.png
deleted file mode 100644
index 982f0d3..0000000
Binary files a/doc/demo01_hello/bilibili/边框.png and /dev/null differ
diff --git a/doc/demo01_hello/bilibili/边框.png.import b/doc/demo01_hello/bilibili/边框.png.import
deleted file mode 100644
index 8d86186..0000000
--- a/doc/demo01_hello/bilibili/边框.png.import
+++ /dev/null
@@ -1,34 +0,0 @@
-[remap]
-
-importer="texture"
-type="StreamTexture"
-path="res://.import/边框.png-5fb9b09adfd38f1fafb9ae2139927b72.stex"
-metadata={
-"vram_texture": false
-}
-
-[deps]
-
-source_file="res://doc/demo01_hello/bilibili/边框.png"
-dest_files=[ "res://.import/边框.png-5fb9b09adfd38f1fafb9ae2139927b72.stex" ]
-
-[params]
-
-compress/mode=0
-compress/lossy_quality=0.7
-compress/hdr_mode=0
-compress/bptc_ldr=0
-compress/normal_map=0
-flags/repeat=0
-flags/filter=true
-flags/mipmaps=false
-flags/anisotropic=false
-flags/srgb=2
-process/fix_alpha_border=true
-process/premult_alpha=false
-process/HDR_as_SRGB=false
-process/invert_color=false
-stream=false
-size_limit=0
-detect_3d=true
-svg/scale=1.0