diff --git a/scripts/check_file.lua b/scripts/check_file.lua
index 1d15041..ff2ba91 100644
--- a/scripts/check_file.lua
+++ b/scripts/check_file.lua
@@ -7,7 +7,7 @@ end
 
 local file_to_check = string.match(ngx.var.request_uri, ".*/(.*)")
 local file_dir = ngx.var.tmp_file_dir
-local fullpath = file_dir .. "/" .. file_to_check .. ".jpeg";
+local fullpath = file_dir .. "/" .. file_to_check .. ".png";
 ngx.log(ngx.INFO, "FILE TO CHECK -> ", fullpath)
 ngx.say(file_exists(fullpath))
 
diff --git a/scripts/combine.lua b/scripts/combine.lua
index c2f2b1b..c0c39e9 100644
--- a/scripts/combine.lua
+++ b/scripts/combine.lua
@@ -13,7 +13,7 @@ ngx.log(ngx.INFO, 'REQ_BODY -> ', ngx.req.get_body_data())
 local data = req_body["payload"]["images"]
 
 local combined_uuid = uuid.generate_v4()
-local combined = file_dir .. "/" .. combined_uuid .. ".jpeg";
+local combined = file_dir .. "/" .. combined_uuid .. ".png";
 
 local len = table.getn(data)
 if len == 0 then
@@ -24,7 +24,9 @@ end
 local origin = {}
 for i = 1, len do
     ngx.log(ngx.INFO, "COMBINE FILE ->", data[i])
-    origin[i] = file_dir .. "/" .. data[i] .. " "
+    local cmd = convert .. " -resize 1280x " .. data[i] .. " " .. data[i] .. ".png"
+    ngx.log(ngx.INFO, 'CMD RESIZE -> ', cmd)
+    origin[i] = file_dir .. "/" .. data[i] .. ".png "
 end
 -- 从 nginx 变量取
 local convert = ngx.var.convert
@@ -36,7 +38,7 @@ if not convert then
 end
 
 local cmd = convert .. " -append " .. table.concat(origin, " ") .. " " .. combined
-ngx.log(ngx.INFO, 'CMD -> ', cmd)
+ngx.log(ngx.INFO, 'CMD APPEND -> ', cmd)
 io.popen(cmd)
 
 ngx.say(combined_uuid)
diff --git a/scripts/upload_combined_image.lua b/scripts/upload_combined_image.lua
index fbf5efe..b6a248f 100644
--- a/scripts/upload_combined_image.lua
+++ b/scripts/upload_combined_image.lua
@@ -7,7 +7,7 @@ local file_to_upload = string.match(ngx.var.request_uri, ".*/(.*)")
 ngx.log(ngx.INFO, 'UPLOAD COMBINED IMAGE -> file to upload -> ', file_to_upload)
 
 local file_dir = ngx.var.tmp_file_dir
-local fullpath = file_dir .. "/" .. file_to_upload .. ".jpeg";
+local fullpath = file_dir .. "/" .. file_to_upload .. ".png";
 
 ngx.log(ngx.INFO, 'UPLOAD COMBINED IMAGE -> fullpath -> ', fullpath)