docs: update README.md

Author: Zhousiru

README.md

@@ -1,32 +1,45 @@
 # Opti Hosts
 
+[[English]](./README.md) [[中文]](./README.zh-CN.md)
+
 Resolve domains by latency, not CDN zones.
 
+This tool retrieves DNS records from Globalping, selects IPs with lowest latency, and updates the hosts file.
+
 ## Quickstart
 
-1. Add directives in your `/etc/hosts`:
+1.  Download from [Releases](https://github.com/Zhousiru/opti-hosts/releases/latest).
+
+    For example:
+
+    ```bash
+    sudo wget https://github.com/Zhousiru/opti-hosts/releases/download/latest/opti-hosts-x86_64-unknown-linux-gnu -O /usr/local/bin/opti-hosts
+    sudo chmod +x /usr/local/bin/opti-hosts
+    ```
+
+2.  Add directives in your `/etc/hosts`:
 
-   ```plaintext
-   # ...
+    ```plaintext
+    # ...
 
-   # OPTI-HOSTS example.com [Beijing, HK * 2, AS6939]
-   # HINT: Record for example.com will be generated here.
+    # OPTI-HOSTS example.com [Beijing, HK * 2, AS6939]
+    # HINT: Record for example.com will be generated here.
 
-   # ...
-   ```
+    # ...
+    ```
 
-2. Run:
+3.  Run:
 
-   ```bash
-   sudo opti-hosts
-   sudo opti-hosts --dry-run # Preview changes
-   ```
+    ```bash
+    sudo opti-hosts
+    sudo opti-hosts --dry-run # Preview changes
+    ```
 
-3. Add to your crontab (recommend):
+4.  Add to your crontab (recommend):
 
-   ```bash
-   0 */12 * * * opti-hosts
-   ```
+    ```bash
+    0 */12 * * * opti-hosts
+    ```
 
 ## Hosts Directive
 

README.zh-CN.md

@@ -0,0 +1,78 @@
+# Opti Hosts：拼好 Hosts
+
+[[English]](./README.md) [[中文]](./README.zh-CN.md)
+
+通过延迟而非 CDN 区域解析域名。
+
+这个工具从 Globalping 检索 DNS 记录，选择延迟最低的 IP 地址，并更新 hosts 文件。
+
+## 快速开始
+
+1.  从 [Releases](https://github.com/Zhousiru/opti-hosts/releases/latest) 下载。
+
+    例如：
+
+    ```bash
+    sudo wget https://github.com/Zhousiru/opti-hosts/releases/download/latest/opti-hosts-x86_64-unknown-linux-gnu -O /usr/local/bin/opti-hosts
+    sudo chmod +x /usr/local/bin/opti-hosts
+    ```
+
+2.  在你的 `/etc/hosts` 中添加指令：
+
+    ```plaintext
+    # ...
+
+    # OPTI-HOSTS example.com [Beijing, HK * 2, AS6939]
+    # 提示: example.com 的记录将在此处生成。
+
+    # ...
+    ```
+
+3.  运行：
+
+    ```bash
+    sudo opti-hosts
+    sudo opti-hosts --dry-run # 预览更改
+    ```
+
+4.  添加到你的 crontab（推荐）：
+
+    ```bash
+    0 */12 * * * opti-hosts
+    ```
+
+## Hosts 指令
+
+```
+# OPTI-HOSTS <域名> [<位置> * <限制>, <位置>, ...]
+```
+
+- **域名**
+
+  你想要解析的域名。
+
+- **位置**
+
+  你想要从哪个地理位置或网络解析域名。
+
+  参见 [Globalping Network](https://globalping.io/network)，或在 [Globalping](https://globalping.io/) 上尝试。
+
+- **限制**
+
+  用于特定位置的最大节点数。
+
+  默认为 1。
+
+## 用法
+
+```bash
+opti-hosts [选项]
+```
+
+```plaintext
+选项:
+      --dry-run      预览输出而不对 hosts 文件进行任何更改
+      --file <FILE>  Hosts 文件路径 [默认: /etc/hosts]
+  -h, --help         打印帮助
+  -V, --version      打印版本
+```