diff --git a/Cargo.lock b/Cargo.lock
index 5a15bb2e..f602c686 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -505,6 +505,15 @@ dependencies = [
  "generic-array",
 ]
 
+[[package]]
+name = "block-padding"
+version = "0.3.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a8894febbff9f758034a5b8e12d87918f56dfc64a8e1fe757d65e29041538d93"
+dependencies = [
+ "generic-array",
+]
+
 [[package]]
 name = "block2"
 version = "0.6.2"
@@ -672,6 +681,15 @@ dependencies = [
  "rustversion",
 ]
 
+[[package]]
+name = "cbc"
+version = "0.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "26b52a9543ae338f279b96b0b9fed9c8093744685043739079ce85cd58f289a6"
+dependencies = [
+ "cipher",
+]
+
 [[package]]
 name = "cc"
 version = "1.2.56"
@@ -2885,6 +2903,7 @@ version = "0.1.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "879f10e63c20629ecabbb64a8010319738c66a5cd0c29b02d63d272b03751d01"
 dependencies = [
+ "block-padding",
  "generic-array",
 ]
 
@@ -3834,9 +3853,11 @@ dependencies = [
 name = "openfang-channels"
 version = "0.4.4"
 dependencies = [
+ "aes",
  "async-trait",
  "axum",
  "base64 0.22.1",
+ "cbc",
  "chrono",
  "dashmap",
  "futures",
@@ -3848,6 +3869,7 @@ dependencies = [
  "mailparse",
  "native-tls",
  "openfang-types",
+ "regex-lite",
  "reqwest 0.12.28",
  "serde",
  "serde_json",
diff --git a/crates/openfang-channels/Cargo.toml b/crates/openfang-channels/Cargo.toml
index 49e57250..71e10d1e 100644
--- a/crates/openfang-channels/Cargo.toml
+++ b/crates/openfang-channels/Cargo.toml
@@ -27,6 +27,9 @@ sha2 = { workspace = true }
 base64 = { workspace = true }
 hex = { workspace = true }
 html-escape = { workspace = true }
+aes = "0.8"
+cbc = "0.1"
+regex-lite = "0.1"
 
 lettre = { workspace = true }
 imap = { workspace = true }
diff --git a/crates/openfang-channels/src/dingtalk_stream.rs b/crates/openfang-channels/src/dingtalk_stream.rs
index c8abf114..d5c96b88 100644
--- a/crates/openfang-channels/src/dingtalk_stream.rs
+++ b/crates/openfang-channels/src/dingtalk_stream.rs
@@ -99,7 +99,7 @@ impl DingTalkStreamAdapter {
     ) -> Result<(), Box<dyn std::error::Error>> {
         let token = self.get_token().await.map_err(|e| -> Box<dyn std::error::Error> { e })?;
 
-        let (msg_key, msg_param) = match &content {
+        let (msg_key, _msg_param) = match &content {
             ChannelContent::Text(t) => (
                 "sampleText",
                 serde_json::json!({ "content": t }).to_string(),
@@ -283,20 +283,12 @@ impl ChannelAdapter for DingTalkStreamAdapter {
 
 // ─── Token helpers ───────────────────────────────────────────────────────────
 
+#[derive(Default)]
 struct TokenCache {
     token: String,
     expire_at: u64,
 }
 
-impl Default for TokenCache {
-    fn default() -> Self {
-        Self {
-            token: String::new(),
-            expire_at: 0,
-        }
-    }
-}
-
 async fn get_access_token(
     http: &reqwest::Client,
     app_key: &str,