diff --git a/app/demolink/BUILD.gn b/app/demolink/BUILD.gn
index f46075f9430bda14b11444b96866edf67b0470b7..48ce7caf74844e188ec008c1c6d5561eaf685aa8 100644
--- a/app/demolink/BUILD.gn
+++ b/app/demolink/BUILD.gn
@@ -12,10 +12,11 @@
 # limitations under the License.
 
 static_library("example_demolink") {
-  sources = [ "helloworld.c" ]
-
-  include_dirs = [
-    "//utils/native/lite/include",
-    "//domains/iot/link/libbuild",
+  sources = [
+    "demosdk.c",
+    "demosdk_adapter.c",
+    "helloworld.c",
   ]
+
+  include_dirs = [ "//utils/native/lite/include" ]
 }
diff --git a/app/demolink/demosdk.c b/app/demolink/demosdk.c
new file mode 100644
index 0000000000000000000000000000000000000000..beb196f68fd0f7845cad2678df21ceddb80ffff8
--- /dev/null
+++ b/app/demolink/demosdk.c
@@ -0,0 +1,50 @@
+/*
+ * Copyright (c) 2020 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#include "demosdk.h"
+
+#include <stdio.h>
+
+#include "demosdk_adapter.h"
+
+#define TASK_STACK_SIZE 1000
+#define TASK_PRIO 20
+#define SECOND_CNT 1000
+
+void *DemoSdkBiz(const char *arg)
+{
+    (void)arg;
+    while (1) {
+        printf("it is demo biz: hello world.\n");
+        DemoSdkSleepMs(SECOND_CNT);
+    }
+    return NULL;
+}
+
+int DemoSdkEntry(void)
+{
+    printf("it is demosdk entry.\n");
+    struct TaskPara para = {0};
+    para.name = "demotask";
+    para.func = (void *)DemoSdkBiz;
+    para.prio = TASK_PRIO;
+    para.size = TASK_STACK_SIZE;
+    unsigned int handle;
+    int ret = DemoSdkCreateTask(&handle, &para);
+    if (ret != 0) {
+        printf("create task fail.\n");
+        return -1;
+    }
+    return 0;
+}
diff --git a/app/demolink/demosdk.h b/app/demolink/demosdk.h
new file mode 100644
index 0000000000000000000000000000000000000000..cecd86bf70fd4c0a0f25c0e61514a6c27fc48519
--- /dev/null
+++ b/app/demolink/demosdk.h
@@ -0,0 +1,21 @@
+/*
+ * Copyright (c) 2020 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef DEMOSDK_H
+#define DEMOSDK_H
+
+int DemoSdkEntry(void);
+
+#endif // DEMOSDK_H
diff --git a/app/demolink/demosdk_adapter.c b/app/demolink/demosdk_adapter.c
new file mode 100644
index 0000000000000000000000000000000000000000..aecd2a7558a392b0d1041cae4cb8ed998ec9794c
--- /dev/null
+++ b/app/demolink/demosdk_adapter.c
@@ -0,0 +1,56 @@
+/*
+ * Copyright (c) 2020 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "demosdk_adapter.h"
+#include <stdio.h>
+
+#include "cmsis_os2.h"
+
+#define MS_CNT 1000
+
+int DemoSdkCreateTask(unsigned int *handle, const struct TaskPara *para)
+{
+    osThreadAttr_t attr = {0};
+    osThreadId_t threadId;
+    if (handle == 0 || para == 0) {
+        return DEMOSDK_ERR;
+    }
+
+    if (para->func == 0) {
+        return DEMOSDK_ERR;
+    }
+
+    if (para->name == 0) {
+        return DEMOSDK_ERR;
+    }
+
+    attr.name = para->name;
+    attr.priority = para->prio;
+    attr.stack_size = para->size;
+    threadId = osThreadNew((osThreadFunc_t)para->func, para->arg, &attr);
+    if (threadId == 0) {
+        printf("osThreadNew fail\n");
+        return DEMOSDK_ERR;
+    }
+
+    *(unsigned int *)handle = (unsigned int)threadId;
+    return DEMOSDK_OK;
+}
+
+void DemoSdkSleepMs(int ms)
+{
+    usleep(MS_CNT * ms);
+}
+
diff --git a/app/demolink/demosdk_adapter.h b/app/demolink/demosdk_adapter.h
new file mode 100644
index 0000000000000000000000000000000000000000..5c836099a77c08c83dcd839867a7a5d0e056bb9e
--- /dev/null
+++ b/app/demolink/demosdk_adapter.h
@@ -0,0 +1,33 @@
+/*
+ * Copyright (c) 2020 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef DEMOSDK_ADAPTER_H
+#define DEMOSDK_ADAPTER_H
+
+#define DEMOSDK_ERR (-1)
+#define DEMOSDK_OK 0
+
+struct TaskPara {
+    char *name;
+    void *(*func)(char* arg);
+    void *arg;
+    unsigned char prio;
+    unsigned int size;
+};
+
+int DemoSdkCreateTask(unsigned int *handle, const struct TaskPara *para);
+void DemoSdkSleepMs(int ms);
+
+#endif // DEMOSDK_ADAPTER_H