diff --git a/interfaces/kits/cj/src/fsync.cpp b/interfaces/kits/cj/src/fsync.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..e6d36ba1bd39fba26b00ee5fcf53dafb5b705d35
--- /dev/null
+++ b/interfaces/kits/cj/src/fsync.cpp
@@ -0,0 +1,47 @@
+/*
+ * Copyright (c) 2024 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 "fsync.h"
+#include "file_fs_impl.h"
+
+#include <cstring>
+#include <unistd.h>
+
+
+namespace OHOS {
+namespace CJSystemapi {
+
+using namespace std;
+
+int FsyncImpl::Fsync(int32_t fd)
+{
+    LOGI("FS_TEST::FsyncImpl::Fsync start");
+    std::unique_ptr<uv_fs_t, decltype(CommonFunc::FsReqCleanup)*> fsync_req = {
+        new uv_fs_t, CommonFunc::FsReqCleanup };
+    if (!fsync_req) {
+        LOGE("Failed to request heap memory.");
+        return ENOMEM;
+    }
+    int ret = uv_fs_fsync(nullptr, fsync_req.get(), fd, nullptr);
+    if (ret < 0) {
+        LOGE("Failed to transfer data associated with file descriptor: %{public}d", fd);
+        return ret;
+    }
+    LOGI("FS_TEST::FsyncImpl::Fsync success");
+    return ret;
+}
+
+} // namespace CJSystemapi
+} // namespace OHOS
diff --git a/interfaces/kits/cj/src/fsync.h b/interfaces/kits/cj/src/fsync.h
new file mode 100644
index 0000000000000000000000000000000000000000..8a826b443096ed4bd48783b836c12c882b9f9a72
--- /dev/null
+++ b/interfaces/kits/cj/src/fsync.h
@@ -0,0 +1,31 @@
+/*
+ * Copyright (c) 2024 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 OHOS_FILE_FS_FSYNC_H
+#define OHOS_FILE_FS_FSYNC_H
+
+#include <cstdint>
+
+namespace OHOS {
+namespace CJSystemapi {
+
+class FsyncImpl {
+public:
+    static int Fsync(int32_t fd);
+};
+
+}
+}
+#endif //OHOS_FILE_FS_FDATASYNC_H
diff --git a/interfaces/kits/cj/src/lseek.cpp b/interfaces/kits/cj/src/lseek.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..e8e2cb5b1944bd90ef73414d51407b781097ffd2
--- /dev/null
+++ b/interfaces/kits/cj/src/lseek.cpp
@@ -0,0 +1,52 @@
+/*
+ * Copyright (c) 2024 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 "lseek.h"
+
+#include "stat_impl.h"
+#include "macro.h"
+#include "n_error.h"
+#include "file_utils.h"
+#include "rust_file.h"
+
+namespace OHOS {
+namespace CJSystemapi {
+using namespace std;
+using namespace OHOS::FileManagement::LibN;
+
+RetDataI64 LseekImpl::Lseek(int32_t fd, int64_t offset, int pos)
+{
+    LOGI("FS_TEST:: LseekImpl::Lseek start");
+    RetDataI64 ret = { .code = EINVAL, .data = 0 };
+    if (fd < 0) {
+        LOGE("Invalid fd");
+        return ret;
+    }
+    
+    SeekPos whence = SeekPos::START;
+    whence = static_cast<SeekPos>(pos);
+
+    int64_t seekRet = ::Lseek(fd, offset, whence);
+    if (seekRet < 0) {
+        LOGE("Failed to lseek, error:%{public}d", errno);
+        ret.code = errno;
+        return ret;
+    }
+    ret.code = SUCCESS_CODE;
+    ret.data = seekRet;
+    return ret;
+}
+
+} // CJSystemapi
+} // OHOS
diff --git a/interfaces/kits/cj/src/lseek.h b/interfaces/kits/cj/src/lseek.h
new file mode 100644
index 0000000000000000000000000000000000000000..912ac7ddfbf831655f4ee1ffe7d19644a175ad35
--- /dev/null
+++ b/interfaces/kits/cj/src/lseek.h
@@ -0,0 +1,31 @@
+/*
+ * Copyright (c) 2024 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 OHOS_FILE_FS_LSEEK_H
+#define OHOS_FILE_FS_LSEEK_H
+
+#include "cj_common_ffi.h"
+
+namespace OHOS {
+namespace CJSystemapi {
+
+class LseekImpl {
+public:
+    static RetDataI64 Lseek(int32_t fd, int64_t offset, int pos);
+};
+
+
+} // namespace CJSystemapi
+} // namespace OHOS
+#endif // OHOS_FILE_FS_LSEEK_H