diff --git a/CHANGE.md b/CHANGE.md
index c1b7eff0..a0fcde40 100644
--- a/CHANGE.md
+++ b/CHANGE.md
@@ -802,4 +802,8 @@
   
 * 2017-08-25
 
-  + version upgrade to 1.7.8
\ No newline at end of file
+  + version upgrade to 1.7.8
+  
+* 2017-11-09
+
+  + version upgrade to 1.7.9
\ No newline at end of file
diff --git a/weixin4j-example/src/main/java/PayTest.java b/weixin4j-example/src/main/java/PayTest.java
deleted file mode 100644
index 523b3d6a..00000000
--- a/weixin4j-example/src/main/java/PayTest.java
+++ /dev/null
@@ -1,58 +0,0 @@
-
-
-import java.io.IOException;
-
-import com.foxinmy.weixin4j.exception.WeixinException;
-import com.foxinmy.weixin4j.model.WeixinPayAccount;
-import com.foxinmy.weixin4j.payment.WeixinPayProxy;
-import com.foxinmy.weixin4j.payment.mch.RefundResult;
-import com.foxinmy.weixin4j.sign.WeixinPaymentSignature;
-import com.foxinmy.weixin4j.sign.WeixinSignature;
-import com.foxinmy.weixin4j.type.CurrencyType;
-import com.foxinmy.weixin4j.type.IdQuery;
-import com.foxinmy.weixin4j.type.IdType;
-import com.foxinmy.weixin4j.type.mch.RefundAccountType;
-
-/**
- * 支付测试（商户平台）
- *
- * @className PayTest
- * @author jinyu(foxinmy@gmail.com)
- * @date 2016年1月30日
- * @since JDK 1.7
- * @see
- */
-public class PayTest {
-	protected final static WeixinPayAccount ACCOUNT;
-	protected final static WeixinSignature SIGNATURE;
-	protected final static WeixinPayProxy PAY;
-
-	static {
-		ACCOUNT = new WeixinPayAccount(
-				"wx0d1d598c0c03c999",
-				"GATFzDwbQdbbci3QEQxX2rUBvwTrsMiZ",
-				"10020674",
-				"10020674",
-				"/Users/jy/workspace/feican/canyi-weixin-parent/canyi-weixin-service/src/main/resources/10020674.p12");
-		SIGNATURE = new WeixinPaymentSignature(ACCOUNT.getPaySignKey());
-		PAY = new WeixinPayProxy(ACCOUNT);
-	}
-
-	public static void refund() throws WeixinException, IOException {
-		IdQuery idQuery = new IdQuery("TT_1427183696238", IdType.TRADENO);
-		RefundResult result = PAY.applyRefund(idQuery,
-				"TT_R" + System.currentTimeMillis(), 0.01d, 0.01d,
-				CurrencyType.CNY, "10020674", "退款描述",
-				RefundAccountType.REFUND_SOURCE_RECHARGE_FUNDS);
-		System.err.println(result);
-		String sign = result.getSign();
-		result.setSign(null);
-		String valiSign = SIGNATURE.sign(result);
-		System.err
-				.println(String.format("sign=%s,valiSign=%s", sign, valiSign));
-	}
-	
-	public static void main(String[] args) throws WeixinException, IOException{
-		refund();
-	}
-}
\ No newline at end of file
diff --git a/weixin4j-mp/CHANGE.md b/weixin4j-mp/CHANGE.md
index 66f22379..b4c9eb4a 100644
--- a/weixin4j-mp/CHANGE.md
+++ b/weixin4j-mp/CHANGE.md
@@ -290,4 +290,8 @@
   
   + 第三方开放平台调整
   
-  + version upgrade to 1.7.8
\ No newline at end of file
+  + version upgrade to 1.7.8
+  
+* 2017-11-09
+
+  + version upgrade to 1.7.9
\ No newline at end of file
diff --git a/weixin4j-qy/CHANGE.md b/weixin4j-qy/CHANGE.md
index b3926392..0d81e51a 100644
--- a/weixin4j-qy/CHANGE.md
+++ b/weixin4j-qy/CHANGE.md
@@ -225,4 +225,8 @@
 
   + 企业号调整为企业微信
   
-  + version upgrade to 1.7.8
\ No newline at end of file
+  + version upgrade to 1.7.8
+  
+* 2017-11-09
+
+  + version upgrade to 1.7.9
\ No newline at end of file