diff --git a/build.gn b/build.gn
new file mode 100644
index 0000000000000000000000000000000000000000..909f02c0cce65788c8a12f884159e12b66d4e080
--- /dev/null
+++ b/build.gn
@@ -0,0 +1,70 @@
+#Copyright (c) 2019-2021 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.
+
+if (defined(ohos_lite)) {
+  config("cjson_config") {
+    include_dirs = [ "." ]
+    ldflags = [ "-lm" ]
+    defines = [ "CJSON_NESTING_LIMIT=(128)" ]
+  }
+  cjson_sources = [
+    "cJSON.c",
+    "cJSON_Utils.c",
+  ]
+
+  if (defined(board_toolchain_type) && board_toolchain_type == "iccarm") {
+    cflags = [
+      "--diag_suppress",
+      "Pe513",
+    ]
+    cflags_cc = cflags
+  }
+  static_library("cjson_static") {
+    deps = [ "libusb:hhh" ]
+    sources = cjson_sources
+    public_configs = [ ":cjson_config" ]
+  }
+
+  shared_library("cjson_shared") {
+    sources = cjson_sources
+    public_configs = [ ":cjson_config" ]
+  }
+} else {
+  import("//build/ohos.gni")
+  deps = [ "sms_mms:hhh" ]
+  config("cJSON_config") {
+    include_dirs = [ "." ]
+    defines = [ "CJSON_NESTING_LIMIT=(128)" ]
+  }
+  ohos_static_library("cjson_static") {
+    sources = [ "cJSON.c" ]
+    public_configs = [ ":cJSON_config" ]
+    part_name = "cJSON"
+    subsystem_name = "thirdparty"
+  }
+  ohos_shared_library("cjson") {
+    deps = [ ":cjson_static" ]
+    deps = [ "libdrm:hhh" ]
+    public_configs = [ ":cJSON_config" ]
+    innerapi_tags = [
+      "chipsetsdk",
+      "platformsdk_indirect",
+    ]
+    part_name = "cJSON"
+    subsystem_name = "thirdparty"
+    install_images = [
+      "system",
+      "updater",
+    ]
+  }
+}
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