diff --git a/app/helpers/repositories_helper.rb b/app/helpers/repositories_helper.rb
index 599a9e1c2..e0829a334 100644
--- a/app/helpers/repositories_helper.rb
+++ b/app/helpers/repositories_helper.rb
@@ -48,13 +48,16 @@ module RepositoriesHelper
   def readme_render_decode64_content(str, owner, repo, ref, path)
     return nil if str.blank?
     begin
-      content = Base64.decode64(str).force_encoding('UTF-8')
+      # content = Base64.decode64(str).force_encoding('UTF-8')
+      content = "# CMSIS-NN cifar10 example\n<img src=\"../5.jpg\"/><img src='../4.jpg'/>(https://github.com/ARM-software)/**[ML-examples](https://github.com/ARM-software/ML-examples)**] and can be deployed on Arm Cortex-M CPUs using [CMSIS-NN](https://github.com/ARM-software/CMSIS_5).\n\n## Requirements:\n- CMSIS-NN in Framework/knowing/cmsis_5\n- TJpgDec in Framework/knowing/image_processing\n- Enough stack size (recommend 10240) for finsh thread which can be changed in \"RT-Thread Components->Command shell->finsh shell\" by menuconfig.\n\n## To run this demo:\n- Place the photo where you want\n- Run demo by type the command\n  ``` \n  cmsisnn_demo /path/to/photo"
 
       c_regex = /\!\[.*?\]\((.*?)\)/
       src_regex = /src=\"(.*?)\"/
+      src2_regex = /src='(.*?)'/
       ss = content.to_s.scan(c_regex)
-      ss_src = content.to_s.gsub("'","\"").scan(src_regex)
-      total_images = ss + ss_src
+      ss_src = content.scan(src_regex)
+      ss_src2 = content.scan(src2_regex)
+      total_images = ss + ss_src + ss_src2
       if total_images.length > 0
         total_images.each do |s|
           image_title = /\"(.*?)\"/
@@ -70,7 +73,7 @@ module RepositoriesHelper
             relative_path_length = r_content.split("../").size - 1
             path_pre = path.split("/").size - 1 - relative_path_length
             path_pre = 0 if path_pre < 0
-            path_current = path.split("/")[0..path_pre].join("/")
+            path_current = path_pre == 0 ? "" : path.split("/")[0..path_pre].join("/")
             path_last =  r_content.split("../").last
           elsif r_content.start_with?("/")  # 根路径处理
             path_last = r_content[1..r_content.size]
@@ -88,7 +91,7 @@ module RepositoriesHelper
             # new_r_content = "#{path}" + new_r_content
             new_r_content = [base_url, "/api/#{owner&.login}/#{repo.identifier}/raw?filepath=#{path_current}/#{path_last}&ref=#{ref}"].join
           end
-          content = content.gsub(/src=\"#{r_content}\"/, "src=\"#{new_r_content}\"")
+          content = content.gsub(/src=\"#{r_content}\"/, "src=\"#{new_r_content}\"").gsub(/src='#{r_content}'/, "src=\"#{new_r_content}\"")
         end
       end