diff --git a/blog/wx/qrcode-210607.jpg b/blog/wx/qrcode-210627.jpg
similarity index 100%
rename from blog/wx/qrcode-210607.jpg
rename to blog/wx/qrcode-210627.jpg
diff --git a/blog/wx/qrcode-210721.jpg b/blog/wx/qrcode-210721.jpg
new file mode 100644
index 0000000..8703a42
Binary files /dev/null and b/blog/wx/qrcode-210721.jpg differ
diff --git a/blog/wx/qrcode.jpg b/blog/wx/qrcode.jpg
index 8703a42..56548f9 100644
Binary files a/blog/wx/qrcode.jpg and b/blog/wx/qrcode.jpg differ