diff --git a/src/main/java/quant/rich/emoney/patch/okhttp/RequestContext.java b/src/main/java/quant/rich/emoney/patch/okhttp/RequestContext.java
index cceb5c8..c645d07 100644
--- a/src/main/java/quant/rich/emoney/patch/okhttp/RequestContext.java
+++ b/src/main/java/quant/rich/emoney/patch/okhttp/RequestContext.java
@@ -12,6 +12,10 @@ public class RequestContext {
     public final String host;
     public final Request.Builder builder;
 
+    /**
+     * 使用 OkHttp Request.Builder 来初始化上下文，包括 scheme、host 和 headers
+     * @param builder
+     */
     public RequestContext(Request.Builder builder) {
         this.builder = builder;
         List<String> nvList = builder.getHeaders$okhttp().getNamesAndValues$okhttp();
@@ -27,6 +31,12 @@ public class RequestContext {
         this.host = url.replaceFirst("https?://", "").split("/")[0];
     }
     
+    /**
+     * 使用指定 headers、scheme 和 host 来初始化上下文，一般用在单元测试场景
+     * @param headers
+     * @param scheme
+     * @param host
+     */
     public RequestContext(Map<String, String> headers, String scheme, String host) {
         this.builder = null;
         this.headers = headers;