doc: tweak headless.
diff --git a/en/tutorial/headless.md b/en/tutorial/headless.md
index 2bae6de..b78a4b0 100644
--- a/en/tutorial/headless.md
+++ b/en/tutorial/headless.md
@@ -13,3 +13,5 @@
+ https://github.com/chfw/echarts-scrappeteer
+ https://github.com/chfw/pyecharts-snapshot/blob/master/pyecharts_snapshot/phantomjs/snapshot.js
+ https://gist.github.com/pissang/4c32ee30e35c91336af72b129a1a4a73
+
+Notice: if server-side rendering result is different from browser-side rendering, please set [animation](option.html#animation) as `false` and try again.
diff --git a/zh/tutorial/headless.md b/zh/tutorial/headless.md
index 7b99409..c28566a 100644
--- a/zh/tutorial/headless.md
+++ b/zh/tutorial/headless.md
@@ -12,4 +12,7 @@
+ https://github.com/hellosean1025/node-echarts
+ https://github.com/chfw/echarts-scrappeteer
+ https://github.com/chfw/pyecharts-snapshot/blob/master/pyecharts_snapshot/phantomjs/snapshot.js
-+ https://gist.github.com/pissang/4c32ee30e35c91336af72b129a1a4a73
\ No newline at end of file
++ https://gist.github.com/pissang/4c32ee30e35c91336af72b129a1a4a73
+
+
+注意：如果发现 server 端渲染结果和浏览器渲染结果不一致，请将 [animation](option.html#animation) 设置为 `false` 再尝试一下。
