diff --git a/README.md b/README.md
index 9f2dafc..5f30746 100644
--- a/README.md
+++ b/README.md
@@ -49,7 +49,7 @@ $ ./gradlew build
 ## Javadoc
 
 For the latest javadocs for the `main` branch, run `./gradlew javadoc` and open
-the [javadoc](build/docs/javadoc/index.html) in your browser.
+the document under the `build/docs/javadoc/index.html` in your browser.
 
 ## Testing
 
@@ -82,15 +82,28 @@ cd sui/target/release
 ./gradlew integrationTest
 ```
 
-## Supported APIs
+## Supported APIs (sui SDK 0.25.0)
 
 - [x] sui_batchTransaction
+- [ ] sui_devInspectTransaction
 - [x] sui_dryRunTransaction
 - [x] sui_executeTransaction
+- [x] sui_executeTransactionSerializedSig(same with sui_executeTransaction)
+- [ ] sui_getAllBalances
+- [ ] sui_getAllCoins
+- [ ] sui_getBalance
+- [ ] sui_getCheckpointContents
+- [ ] sui_getCheckpointContentsByDigest
+- [ ] sui_getCheckpointSummary
+- [ ] sui_getCheckpointSummaryByDigest
 - [x] sui_getCoinMetadata
-- [ ] sui_executeTransactionSerializedSig
+- [ ] sui_getCoins
 - [x] sui_getCommitteeInfo
+- [ ] sui_getDelegatedStakes
+- [ ] sui_getDynamicFieldObject
+- [ ] sui_getDynamicFields
 - [x] sui_getEvents
+- [ ] sui_getLatestCheckpointSequenceNumber
 - [x] sui_getMoveFunctionArgTypes
 - [x] sui_getNormalizedMoveFunction
 - [x] sui_getNormalizedMoveModule
@@ -100,24 +113,32 @@ cd sui/target/release
 - [x] sui_getObjectsOwnedByAddress
 - [x] sui_getObjectsOwnedByObject
 - [x] sui_getRawObject
+- [x] sui_getReferenceGasPrice
+- [ ] sui_getSuiSystemState
+- [ ] sui_getTotalSupply
 - [x] sui_getTotalTransactionNumber
 - [x] sui_getTransaction
+- [ ] sui_getTransactionAuthSigners
 - [x] sui_getTransactions
 - [x] sui_getTransactionsInRange
+- [ ] sui_getValidators
 - [x] sui_mergeCoins
 - [x] sui_moveCall
 - [x] sui_pay
 - [x] sui_payAllSui
 - [x] sui_paySui
 - [x] sui_publish
+- [ ] sui_requestAddDelegation
+- [ ] sui_requestSwitchDelegation
+- [ ] sui_requestWithdrawDelegation
 - [x] sui_splitCoin
 - [x] sui_splitCoinEqual
-- [ ] sui_subscribeEvent
+- [x] sui_subscribeEvent
+- [ ] sui_tblsSignRandomnessObject
 - [x] sui_transferObject
 - [x] sui_transferSui
 - [x] sui_tryGetPastObject
-- [ ] sui_getTransactionAuthSigners
-- [ ] sui_getSuiSystemState
+
 
 ## Examples
 
diff --git a/build.gradle b/build.gradle
index a188103..c2e94e3 100644
--- a/build.gradle
+++ b/build.gradle
@@ -11,7 +11,7 @@ plugins {
 
 
 group 'me.grapebaba'
-version '0.3.2'
+version '0.4.0'
 
 repositories {
 	mavenCentral()
diff --git a/docs/build.md b/docs/build.md
new file mode 100644
index 0000000..55906c5
--- /dev/null
+++ b/docs/build.md
@@ -0,0 +1,8 @@
+## Build
+
+To get started you need to install JDK8+, then run the following command:
+```shell
+./gradlew build
+```
+
+For detail, please check the [README](https://github.com/GrapeBaBa/sui4j/blob/main/README.md).
\ No newline at end of file
diff --git a/docs/event.md b/docs/event.md
index e69de29..abaa5e4 100644
--- a/docs/event.md
+++ b/docs/event.md
@@ -0,0 +1,18 @@
+## Subscribe Events
+
+### SubscribeEvent
+
+```java
+        EventTypeEventFilter eventFilter = new EventTypeEventFilter();
+        eventFilter.setEventType(EventType.CoinBalanceChange);
+        Disposable disposable =
+          sui.subscribeEvent(
+                eventFilter,
+                <event_callback>,
+                <error_callback>);  
+        moveCall(); // transaction invocation
+    
+        disposable.dispose(); // undo subscribe
+```
+
+For more examples, you can see [SuiIntTests](https://github.com/GrapeBaBa/sui4j/blob/main/src/integrationTest/java/io/sui/SuiIntTests.java)
diff --git a/mkdocs.yml b/mkdocs.yml
index 6394663..b16cbc1 100644
--- a/mkdocs.yml
+++ b/mkdocs.yml
@@ -5,7 +5,7 @@ site_dir: "_site"
 
 repo_name: "GrapeBaBa/sui4j"
 repo_url: https://github.com/GrapeBaBa/sui4j
-edit_uri: blob/main/docs/
+edit_uri: edit/main/docs/
 
 copyright: "Copyright &copy; 2022-2023 281165273grape@gmail.com"
 
@@ -61,8 +61,8 @@ nav:
       - Init sui client: initsui.md
       - Coin transaction: coin.md
       - Object and Smart Contract: call.md
-#      - Deploy and Interact with Smart Contracts: getting_started/deploy_interact_smart_contracts.md
-#      - Filters and Flowables: getting_started/pub_sub.md
+      - Subscribe Events: event.md
+  - Build: build.md
 #      - Manual Configuration: getting_started/manual_configuration.md
 
 markdown_extensions:
diff --git a/src/integrationTest/java/io/sui/SuiIntTests.java b/src/integrationTest/java/io/sui/SuiIntTests.java
index f7ebc06..cbb96ca 100644
--- a/src/integrationTest/java/io/sui/SuiIntTests.java
+++ b/src/integrationTest/java/io/sui/SuiIntTests.java
@@ -671,12 +671,7 @@ void subscribeEvent() throws ExecutionException, InterruptedException {
     Disposable disposable =
         sui.subscribeEvent(
             eventFilter,
-            new Consumer<EventEnvelope>() {
-              @Override
-              public void accept(EventEnvelope eventEnvelope) throws Throwable {
-                System.out.println(eventEnvelope);
-              }
-            },
+            System.out::println,
             System.out::println);
     moveCall();