diff --git a/README.md b/README.md
index d80b7c7..bd04b6c 100644
--- a/README.md
+++ b/README.md
@@ -13,7 +13,7 @@ Features
 * High performance and easy to use
 * Gets started quickly with demos
 * Supports connection pooling
-* 中英双语注释，英语小白阅读起来也没问题
+* 涓嫳鍙岃娉ㄩ噴锛岃嫳璇皬鐧介槄璇昏捣鏉ヤ篃娌￠棶棰�
 * Supports resend notifications after error
 * Creates new socket automatically when idle
 * Supports the Feedback Service
@@ -64,5 +64,5 @@ You can send an email to me: lzhc2004@163.com
 
 Tips
 ==================
-2014-09-22：ios8更新后，如果没有设置声音(Payload.setSound())，那么手机收到推送很可能不响。
-此时需要更新dbay-apns4j包，或者自己设置下声音。eg: Payload.setSound("xx")。注意不能设为空串，否则不响，设为任意串均可。
+2014-09-22锛歩os8鏇存柊鍚庯紝濡傛灉娌℃湁璁剧疆澹伴煶(Payload.setSound())锛岄偅涔堟墜鏈烘敹鍒版帹閫佸緢鍙兘涓嶅搷銆�
+姝ゆ椂闇�瑕佹洿鏂癲bay-apns4j鍖咃紝鎴栬�呰嚜宸辫缃笅澹伴煶銆俥g: Payload.setSound("xx")銆傛敞鎰忎笉鑳借涓虹┖涓诧紝鍚﹀垯涓嶅搷锛岃涓轰换鎰忎覆鍧囧彲銆�
diff --git a/src/main/java/com/dbay/apns4j/model/ApnsConstants.java b/src/main/java/com/dbay/apns4j/model/ApnsConstants.java
index 5c03f84..2779acc 100644
--- a/src/main/java/com/dbay/apns4j/model/ApnsConstants.java
+++ b/src/main/java/com/dbay/apns4j/model/ApnsConstants.java
@@ -40,7 +40,7 @@ public class ApnsConstants {
 	
 	public static final int ERROR_RESPONSE_BYTES_LENGTH = 6;
 	
-	public static final int PAY_LOAD_MAX_LENGTH = 256;
+	public static final int PAY_LOAD_MAX_LENGTH = 2048;
 	
 	public static final String CHARSET_ENCODING = "UTF-8";
 }