klion26 commented on a change in pull request #13225:
URL: https://github.com/apache/flink/pull/13225#discussion_r489984016
##########
File path: docs/dev/user_defined_functions.zh.md
##########
@@ -147,95 +153,78 @@ data.map (new RichMapFunction[String, Int] {
</div>
-Rich functions provide, in addition to the user-defined function (map,
-reduce, etc), four methods: `open`, `close`, `getRuntimeContext`, and
-`setRuntimeContext`. These are useful for parameterizing the function
-(see [Passing Parameters to Functions]({{ site.baseurl
}}/dev/batch/index.html#passing-parameters-to-functions)),
-creating and finalizing local state, accessing broadcast variables (see
-[Broadcast Variables]({{ site.baseurl
}}/dev/batch/index.html#broadcast-variables)), and for accessing runtime
-information such as accumulators and counters (see
-[Accumulators and Counters](#accumulators--counters)), and information
-on iterations (see [Iterations]({{ site.baseurl }}/dev/batch/iterations.html)).
+除了用户自定义的 function（map，reduce 等），Rich functions
还提供了四个方法：`open`、`close`、`getRuntimeContext` 和
+`setRuntimeContext`。这些方法对于参数化 function
+（参阅 [给 function 传递参数]({% link dev/batch/index.zh.md
%}#passing-parameters-to-functions)），
+创建和最终确定本地状态，访问广播变量（参阅
+[广播变量]({% link dev/batch/index.zh.md %}#broadcast-variables
)），以及访问运行时信息，例如累加器和计数器（参阅
Review comment:
@zhuxiaoshang @RocMarshal 这个地方的链接我怀疑是有问题的，我看了下，这个地方是 FLINK-17009
引入的，但是没有找到更早的历史。
怀疑的原因是，这个文档讲的是 datastream 的 udfs，但是这里的链接是 batch 相关的。
不过这个和整体的翻译无关，能否记录并查找一下这个地方是否真的有问题，正确的链接应该是什么？如果有问题的话，可以再提一个 PR 来进行修改
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