diff --git a/webmagic-core/src/main/java/us/codecraft/webmagic/oo/HelpUrl.java b/webmagic-core/src/main/java/us/codecraft/webmagic/oo/HelpUrl.java
index 1746048..a8ed995 100644
--- a/webmagic-core/src/main/java/us/codecraft/webmagic/oo/HelpUrl.java
+++ b/webmagic-core/src/main/java/us/codecraft/webmagic/oo/HelpUrl.java
@@ -14,4 +14,6 @@ import java.lang.annotation.Target;
 public @interface HelpUrl {
 
     String[] value();
+
+    String sourceRegion() default "";
 }
diff --git a/webmagic-core/src/main/java/us/codecraft/webmagic/oo/TargetUrl.java b/webmagic-core/src/main/java/us/codecraft/webmagic/oo/TargetUrl.java
index 7bbb962..77b5a82 100644
--- a/webmagic-core/src/main/java/us/codecraft/webmagic/oo/TargetUrl.java
+++ b/webmagic-core/src/main/java/us/codecraft/webmagic/oo/TargetUrl.java
@@ -15,4 +15,6 @@ public @interface TargetUrl {
 
     String[] value();
 
+    String sourceRegion() default "";
+
 }
diff --git a/webmagic-core/src/main/java/us/codecraft/webmagic/selector/AndSelector.java b/webmagic-core/src/main/java/us/codecraft/webmagic/selector/AndSelector.java
new file mode 100644
index 0000000..98481ef
--- /dev/null
+++ b/webmagic-core/src/main/java/us/codecraft/webmagic/selector/AndSelector.java
@@ -0,0 +1,53 @@
+package us.codecraft.webmagic.selector;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * @author yihua.huang@dianping.com <br>
+ * @date: 13-8-3 <br>
+ * Time: 下午5:29 <br>
+ */
+public class AndSelector implements Selector {
+
+    private List<Selector> selectors = new ArrayList<Selector>();
+
+    public AndSelector(Selector... selectors) {
+        for (Selector selector : selectors) {
+            this.selectors.add(selector);
+        }
+    }
+
+    @Override
+    public String select(String text) {
+        for (Selector selector : selectors) {
+            if (text == null) {
+                return null;
+            }
+            text = selector.select(text);
+        }
+        return text;
+    }
+
+    @Override
+    public List<String> selectList(String text) {
+        List<String> results = new ArrayList<String>();
+        boolean first = true;
+        for (Selector selector : selectors) {
+            if (first) {
+                results = selector.selectList(text);
+                first = false;
+            } else {
+                List<String> resultsTemp = new ArrayList<String>();
+                for (String result : results) {
+                    resultsTemp.addAll(selector.selectList(result));
+                }
+                results = resultsTemp;
+                if (results == null || results.size() == 0) {
+                    return results;
+                }
+            }
+        }
+        return results;
+    }
+}
diff --git a/webmagic-core/src/main/java/us/codecraft/webmagic/selector/OrSelector.java b/webmagic-core/src/main/java/us/codecraft/webmagic/selector/OrSelector.java
new file mode 100644
index 0000000..2cdd870
--- /dev/null
+++ b/webmagic-core/src/main/java/us/codecraft/webmagic/selector/OrSelector.java
@@ -0,0 +1,41 @@
+package us.codecraft.webmagic.selector;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * @author yihua.huang@dianping.com <br>
+ * @date: 13-8-3 <br>
+ * Time: 下午5:29 <br>
+ */
+public class OrSelector implements Selector {
+
+    private List<Selector> selectors = new ArrayList<Selector>();
+
+    public OrSelector(Selector... selectors) {
+        for (Selector selector : selectors) {
+            this.selectors.add(selector);
+        }
+    }
+
+    @Override
+    public String select(String text) {
+        for (Selector selector : selectors) {
+            text = selector.select(text);
+            if (text!=null){
+                return text;
+            }
+        }
+        return null;
+    }
+
+    @Override
+    public List<String> selectList(String text) {
+        List<String> results = new ArrayList<String>();
+        for (Selector selector : selectors) {
+            List<String> strings = selector.selectList(text);
+            results.addAll(strings);
+        }
+        return results;
+    }
+}
diff --git a/webmagic-core/src/test/java/us/codecraft/webmagic/oo/OschinaBlog.java b/webmagic-core/src/test/java/us/codecraft/webmagic/oo/OschinaBlog.java
index c82ef23..85d4817 100644
--- a/webmagic-core/src/test/java/us/codecraft/webmagic/oo/OschinaBlog.java
+++ b/webmagic-core/src/test/java/us/codecraft/webmagic/oo/OschinaBlog.java
@@ -10,7 +10,7 @@ import java.util.List;
  * Time: 下午10:18 <br>
  */
 @TargetUrl("http://my.oschina.net/flashsword/blog/*")
-public class OschinaBlog implements AfterExtractor<OschinaBlog>{
+public class OschinaBlog implements AfterExtractor<OschinaBlog> {
 
     @ExtractBy("//title")
     private String title;
@@ -23,5 +23,6 @@ public class OschinaBlog implements AfterExtractor<OschinaBlog>{
 
     @Override
     public void afterProcess(Page page, OschinaBlog oschinaBlog) {
+        content = null;
     }
 }
diff --git a/webmagic-core/src/test/java/us/codecraft/webmagic/oo/TestFetcher.java b/webmagic-core/src/test/java/us/codecraft/webmagic/oo/TestFetcher.java
index f4525f0..289cd4f 100644
--- a/webmagic-core/src/test/java/us/codecraft/webmagic/oo/TestFetcher.java
+++ b/webmagic-core/src/test/java/us/codecraft/webmagic/oo/TestFetcher.java
@@ -4,9 +4,6 @@ import org.junit.Ignore;
 import org.junit.Test;
 import us.codecraft.webmagic.Site;
 
-import java.util.ArrayList;
-import java.util.List;
-
 /**
  * @author yihua.huang@dianping.com <br>
  * @date: 13-8-1 <br>
@@ -17,7 +14,6 @@ public class TestFetcher {
     @Ignore("takes long")
     @Test
     public void test() {
-        System.out.println(List.class.isAssignableFrom(ArrayList.class));
         OOSpider.create(Site.me().addStartUrl("http://my.oschina.net/flashsword/blog/145796"), OschinaBlog.class)
                 .run();