diff --git a/Demo/FFmpegApi-Demo/demo1.lua b/Demo/FFmpegApi-Demo/demo1.lua
index 3a95068..502756a 100644
--- a/Demo/FFmpegApi-Demo/demo1.lua
+++ b/Demo/FFmpegApi-Demo/demo1.lua
@@ -1,49 +1,62 @@
--- 定义 API 地址
-local API_URL = "https://ffmpeg.liulikeji.cn/api/ffmpeg"
+-- API 地址 / API Endpoint
+local API_URL = "http://ffmpeg.liulikeji.cn/api/ffmpeg"
 
--- 内置 MP3 URL（可以替换成你的目标音频）
+-- 输入音频URL (可替换) / Input audio URL (replaceable)
 local INPUT_URL = "https://git.liulikeji.cn/xingluo/CCTweaked-Demo/raw/branch/main/Demo/FFmpegApi-Demo/demo.mp3"
 
--- 发送 POST 请求到 FFmpeg API
+-- 主函数 / Main function
 local function convertAndPlay()
-    -- 构造请求数据（使用 DFPWM 转换参数）
+    -- ===== 1. 准备请求数据 / Prepare request data =====
     local requestData = {
         input_url = INPUT_URL,
-        args = { "-vn", "-ar", "48000", "-ac", "1" },
+        args = { "-vn", "-ar", "48000", "-ac", "1" }, -- DFPWM转换参数 / DFPWM conversion args
         output_format = "dfpwm"
     }
 
-    -- 发送 HTTP POST 请求
-    local response = http.post(
+    -- ===== 2. 发送HTTP请求 / Send HTTP request =====
+    local response, err = http.post(
         API_URL,
         textutils.serializeJSON(requestData),
         { ["Content-Type"] = "application/json" }
     )
 
-    -- 检查请求是否成功
+    -- ===== 3. 错误处理 / Error handling =====
+    -- 网络错误 / Network error
     if not response then
-        printError("HTTP 请求失败，请检查网络或 API 地址")
+        printError("HTTP request failed: " .. (err or "unknown error"))
         return
     end
 
-    -- 解析 JSON 响应
-    local responseData = textutils.unserializeJSON(response.readAll())
+    -- 读取响应 / Read response
+    local responseBody = response.readAll()
     response.close()
 
-    -- 检查 API 返回状态
-    if responseData.status ~= "success" then
-        printError("音频转换失败: " .. (responseData.error or "未知错误"))
+    -- HTTP状态码检查 / HTTP status check
+    local statusCode = response.getResponseCode()
+    if statusCode ~= 200 then
+        printError("API error (status "..statusCode..")")
         return
     end
 
-    -- 获取下载 URL
-    local downloadUrl = responseData.download_url
-    print("转换成功！下载 URL: " .. downloadUrl)
+    -- ===== 4. 解析JSON / Parse JSON =====
+    local responseData = textutils.unserializeJSON(responseBody)
+    if not responseData then
+        printError("Invalid API response (bad JSON)")
+        return
+    end
 
-    -- 使用 speaker 播放音频
-    print("正在播放...")
-    shell.execute("speaker play " .. downloadUrl)
+    -- API业务错误 / API logic error
+    if responseData.status ~= "success" then
+        printError("Conversion failed: "..(responseData.error or "no error info"))
+        return
+    end
+
+    -- ===== 5. 播放音频 / Play audio =====
+    print("Conversion successful! Download URL:")
+    print(responseData.download_url)
+    print("Playing...")
+    shell.run("speaker play "..responseData.download_url)
 end
 
--- 调用函数
+-- 执行 / Execute
 convertAndPlay()
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