docs: Updated README docs.

README.md

@@ -1,4 +1,5 @@
 # JDevKit
+
 JDevKit is a Java Development Kit that offers a set of convenient tools for writing code efficiently.
 
 ## Modules
@@ -55,10 +56,47 @@ A Simple JWT implementation using the `io.jsonwebtoken:jjwt-api` library.
 
 <span style="font-size: 14px;">_[Learn more](https://github.com/CodeCraftersCN/jdevkit/simple-jwt-spring-boot-starter/README.md)_</span>
 
-A Spring Boot auto-configuration wrapper for the simple-jwt module, making it easier to integrate JWT functionality into Spring Boot applications.
+A Spring Boot autoconfiguration wrapper for the simple-jwt module, making it easier to integrate JWT functionality into Spring Boot applications.
 
 ## Installation and Usage
-If you are using `maven`, please paste the following codes to `pom.xml` in your project.
+
+### Before Installation
+
+For **Chinese Mainland** users, it is suggested to use maven packages services provided by coding.net.
+
+You could follow the following steps to configure.
+
+#### For Maven
+
+You could add the following codes to register Coding Nexus to your Maven.
+
+```xml
+<repository>
+    <id>codecrafters-coding-nexus</id>
+    <name>codecrafters-coding-nexus</name>
+    <url>https://codecrafters-maven.pkg.coding.net/repository/common-productions/maven-packages/</url>
+    <releases>
+        <enabled>true</enabled>
+    </releases>
+    <snapshots>
+        <enabled>true</enabled>
+    </snapshots>
+</repository>
+```
+
+#### For Gradle
+
+You could add a new repository to Gradle repositories closure.
+
+```groovy
+maven { url 'https://codecrafters-maven.pkg.coding.net/repository/common-productions/maven-packages/' }
+```
+
+```kotlin
+maven(url = "https://codecrafters-maven.pkg.coding.net/repository/common-productions/maven-packages/")
+```
+
+If you are using **Maven**, please paste the following codes to _pom.xml_ in your project.
 
 ```xml 
 <dependency>
@@ -68,12 +106,16 @@ If you are using `maven`, please paste the following codes to `pom.xml` in your
 </dependency>
 ```
 
-If you are using `gradle`, please paste the following codes to `buile.gradle` in your project.
+If you are using **Gradle**, please paste the following codes to _buile.gradle\[.kts\]_ in your project.
 
 ```groovy
 implementation 'cn.org.codecrafters:$artifactId:$version'
 ```
 
+```kotlin
+implementation("cn.org.codecrafters:$artifactId:$version")
+```
+
 If you want to check the available versions, please check out at our [official site](https://codecrafters.org.cn/devkit/changelog).
 
 ## Contribution

webcal/README.md

@@ -22,8 +22,6 @@ Please note that the `webcal` module adheres to the iCalendar standard specified
 
 ## Installation
 
-## Installation
-
 ### If you are using `Maven`
 
 It is quite simple to install this module by `Maven`. The only thing you need to do is find your `pom.xml` file in the project, then find the `<dependencies>` node in the `<project>` node, and add the following codes to `<dependencies>` node: