diff --git a/doc/11-如何设置换源链接与测速链接.md b/doc/11-如何设置换源链接与测速链接.md
index f50ef68..7cd1838 100644
--- a/doc/11-如何设置换源链接与测速链接.md
+++ b/doc/11-如何设置换源链接与测速链接.md
@@ -7,7 +7,7 @@
  ! Contributors  : Nul None <nul@none.org>
  !               |
  ! Created On    : <2025-08-11>
- ! Last Modified : <2025-08-11>
+ ! Last Modified : <2026-01-21>
  ! ---------------------------------------------------------- -->
 
 # 新增/修改 "换源链接"
@@ -24,6 +24,11 @@ def_sources_begin()
 {&Tencent,          "https://mirrors.cloud.tencent.com/npm/",          FeedByPrelude},
 {&某新镜像站,       "某镜像站提供的换源链接"，                         FeedByPrelude}
 def_sources_end()
+
+//
+
+// 调整上述某一个镜像站的所提供源的 "换源链接"
+chef_set_source_url (this, &UpstreamProvider, "新的换源链接");
 ```
 
 <br>
@@ -51,13 +56,17 @@ def_sources_begin()
 {&Tencent,          "https://mirrors.cloud.tencent.com/npm/",          FeedByPrelude},
 def_sources_end()
 
+//
+
+// 调整/设置上述某一个镜像站的所提供源的 "精准测速链接"
+chef_set_source_smurl (this, &UpstreamProvider, "新的测速链接")
 // 把所有上述源的 "测速链接" 设置为 "换源链接" + postfix
 chef_set_sources_speed_measure_url_with_postfix (this, "/dir/BigFile.tar.gz");
 // 基于 "换源链接" 做更自定义的操作
 chef_set_sources_speed_measure_url_with_func (this, func, data);
 
 // 调整某一个镜像站(Provider)的 "测速链接"
-chef_set_provider_speed_measure_url (&Tencent, "https://mirrors.cloud.tencent.com/npm/BigFile.tar.gz")
+chef_set_provider_speed_measure_url (&Tencent, "https://mirrors.cloud.tencent.com/npm/BigFile.tar.gz");
 // 调整某一个镜像站(Provider)的 "测速精度"
-chef_set_provider_speed_measure_accuracy (&UpstreamProvider, ROUGH);;
+chef_set_provider_speed_measure_accuracy (&UpstreamProvider, ROUGH);
 ```
diff --git a/src/framework/chef.c b/src/framework/chef.c
index cbee5c0..c79e272 100644
--- a/src/framework/chef.c
+++ b/src/framework/chef.c
@@ -164,6 +164,10 @@ chef_set_sources_speed_measure_url_with_postfix (Target_t *target, char *postfix
 void
 chef_set_source_url (Target_t *target, SourceProvider_t *provider, char *url)
 {
+  xy_cant_be_null (target);
+  xy_cant_be_null (provider);
+  xy_cant_be_null (url);
+
   for (int i=0; i < target->sources_n; i++)
     {
       Source_t *src = &target->sources[i];
@@ -178,6 +182,32 @@ chef_set_source_url (Target_t *target, SourceProvider_t *provider, char *url)
   xy_unreached();
 }
 
+/**
+ * 设置 或 修改 某个镜像站的 *精准*测速链接
+ *
+ * sm = speed measure
+ */
+void
+chef_set_source_smurl (Target_t *target, SourceProvider_t *provider, char *url)
+{
+  xy_cant_be_null (target);
+  xy_cant_be_null (provider);
+  xy_cant_be_null (url);
+
+  for (int i=0; i < target->sources_n; i++)
+    {
+      Source_t *src = &target->sources[i];
+      SourceProvider_t *p = src->provider;
+      if (p == provider)
+        {
+          src->speed_measure_url = xy_strdup (url);
+          return;
+        }
+    }
+
+  xy_unreached();
+}
+
 
 /**
  * @note 用于: 组中的 item target 在 standalone 模式时正确填充源信息
diff --git a/src/framework/struct.h b/src/framework/struct.h
index ffd0a56..e2553c7 100644
--- a/src/framework/struct.h
+++ b/src/framework/struct.h
@@ -181,7 +181,7 @@ Target_t;
  *   def_sources_end()
  *
  *   若是出于代码美观考虑，上述第三列可以写 FeedByPrelude，然后下面调用函数来填充:
- *     chef_set_source_speed_measure_url()
+ *     chef_set_source_smurl()
  *     chef_set_sources_speed_measure_url_with_postfix()
  *     chef_set_sources_speed_measure_url_with_func()
  */