diff --git a/packages/rax-countdown/CHANGELOG.md b/packages/rax-countdown/CHANGELOG.md
index 3db4e7fc..c6cd9602 100644
--- a/packages/rax-countdown/CHANGELOG.md
+++ b/packages/rax-countdown/CHANGELOG.md
@@ -1,4 +1,7 @@
 # Changelog
+## v1.2.1
+
+- Feat decrease setData data size for promote performance
 
 ## v1.2.0
 
diff --git a/packages/rax-countdown/package.json b/packages/rax-countdown/package.json
index 29472141..900de395 100644
--- a/packages/rax-countdown/package.json
+++ b/packages/rax-countdown/package.json
@@ -1,6 +1,6 @@
 {
   "name": "rax-countdown",
-  "version": "1.2.0",
+  "version": "1.2.1",
   "description": "Countdown component for Rax.",
   "license": "BSD-3-Clause",
   "main": "lib/index.js",
diff --git a/packages/rax-countdown/src/miniapp-native/ali-miniapp/index.ts b/packages/rax-countdown/src/miniapp-native/ali-miniapp/index.ts
index 259e8fad..ba75a0e1 100644
--- a/packages/rax-countdown/src/miniapp-native/ali-miniapp/index.ts
+++ b/packages/rax-countdown/src/miniapp-native/ali-miniapp/index.ts
@@ -88,11 +88,14 @@ Component({
           case 'm':
           case 's':
             if (index % 2 === 0) {
-              // insert plain text before current matched item
-              return {
-                value: tpl.slice(lastPlaintextIndex, val),
-                style: textStyle
-              };
+              const value = tpl.slice(lastPlaintextIndex, val);
+              if (value || textStyle) {
+                  // insert plain text before current matched item
+                return {
+                  value,
+                  style: textStyle
+                };
+              }
             } else {
               // replace current matched item to realtime string
               lastPlaintextIndex = val + 3;