diff --git a/harmony-os/README.md b/harmony-os/README.md
index 280258bd8..5b14bb7bb 100644
--- a/harmony-os/README.md
+++ b/harmony-os/README.md
@@ -2,8 +2,13 @@
 
 - [./SherpaOnnxHar](./SherpaOnnxHar) It is for building `sherpa_onnx.har`.
   If you don't need to change the C++ or Typescript code of sherpa-onnx, then
-  you can download pre-built `sherpa_onnx.har` from us. Please refer to
-  our [doc](https://k2-fsa.github.io/sherpa/onnx) for how to download it.
+  you can download pre-built `sherpa_onnx.har` from us. Just run `ohpm install sherpa_onnx`.
+  Please refer to our [doc](https://k2-fsa.github.io/sherpa/onnx/harmony-os/how-to-build-har.html)
+  if you want to build `sherpa-onnx` from source.
 
 - [./SherpaOnnxVadAsr](./SherpaOnnxVadAsr) It shows how to use
   VAD + Non-streaming ASR for speech recognition.
+  Please see the doc at <https://k2-fsa.github.io/sherpa/onnx/harmony-os/vad-asr.html>
+
+- [./SherpaOnnxTts](./SherpaOnnxTts) It shows how to run on-device text-to-speech.
+  Please see the doc at <https://k2-fsa.github.io/sherpa/onnx/harmony-os/tts.html>
diff --git a/harmony-os/SherpaOnnxHar/README.md b/harmony-os/SherpaOnnxHar/README.md
index 5896e7acf..a378f73cc 100644
--- a/harmony-os/SherpaOnnxHar/README.md
+++ b/harmony-os/SherpaOnnxHar/README.md
@@ -1,37 +1,6 @@
 # Introduction
 
-How to build `sherpa_onnx.har` from the command line:
+How to build `sherpa_onnx.har` from the command line
+----------------------------------------------------
 
-```bash
-git clone https://github.com/k2-fsa/sherpa-onnx
-cd sherpa-onnx
-./build-ohos-arm64-v8a.sh
-./build-ohos-x86-64.sh
-
-cd harmony-os/SherpaOnnxHar
-
-hvigorw clean --no-daemon
-
-hvigorw --mode module -p product=default -p module=sherpa_onnx@default assembleHar --analyze=normal --parallel --incremental --no-daemon
-
-ls -lh ./sherpa_onnx/build/default/outputs/default/sherpa_onnx.har
-```
-
-Pre-built `har` packages can be found at
-<https://huggingface.co/csukuangfj/sherpa-onnx-harmony-os/tree/main/har>
-
-You can also download it using
-```
-wget https://ohpm.openharmony.cn/ohpm/sherpa_onnx/-/sherpa_onnx-1.10.33.har
-
-# Please replace the version 1.10.33 if needed.
-```
-
-You can also use
-```
-ohpm install sherpa_onnx
-```
-to install it.
-
-See also
-<https://ohpm.openharmony.cn/#/cn/detail/sherpa_onnx>
+Please see https://k2-fsa.github.io/sherpa/onnx/harmony-os/how-to-build-har.html
diff --git a/harmony-os/SherpaOnnxTts/README.md b/harmony-os/SherpaOnnxTts/README.md
new file mode 100644
index 000000000..03fb76313
--- /dev/null
+++ b/harmony-os/SherpaOnnxTts/README.md
@@ -0,0 +1,5 @@
+# Introduction
+
+Please see
+https://k2-fsa.github.io/sherpa/onnx/harmony-os/tts.html
+for how to run code in this folder.
diff --git a/harmony-os/SherpaOnnxVadAsr/README.md b/harmony-os/SherpaOnnxVadAsr/README.md
new file mode 100644
index 000000000..9d9338e8a
--- /dev/null
+++ b/harmony-os/SherpaOnnxVadAsr/README.md
@@ -0,0 +1,5 @@
+# Introduction
+
+Please see
+https://k2-fsa.github.io/sherpa/onnx/harmony-os/vad-asr.html
+for how to run code in this folder.