diff --git a/centos2anolis.py b/centos2anolis.py
index 50587c23c0232aafe7f9a87bda51c19b14ead63d..8e4d98011134122de8a3706ffa8b8c8925bc1e1d 100644
--- a/centos2anolis.py
+++ b/centos2anolis.py
@@ -402,6 +402,12 @@ def main(reinstall_all_rpms=False, verify_all_rpms=False, accelerate=False, vers
                 if opt != 'Yes':
                     sys.exit(1)
 
+    print("========= Looking for yumdownloader ==========")
+    if not check_pkg('yumdownloader'):
+        subprocess.run("yum -y install yum-utils", shell=True)
+        if not check_pkg('yumdownloader'):
+            clean_and_exit()
+
     print("========= Finding your repository directory =========")
     dir = '/etc/yum.repos.d/'
     if os.path.isdir(dir):
@@ -424,12 +430,6 @@ def main(reinstall_all_rpms=False, verify_all_rpms=False, accelerate=False, vers
     if accelerate:
         change_repo_mirror(reposdir, 'switch-to-anolis.repo')
 
-    print("========= Looking for yumdownloader ==========")
-    if not check_pkg('yumdownloader'):
-        subprocess.run("yum -y install yum-utils --disablerepo an* || true", shell=True)
-        if not check_pkg('yumdownloader'):
-            clean_and_exit()
-
     print("========= Start converting =========")
 
     print("Backing up and removing old repository files...")
diff --git a/centos2anolis.spec b/centos2anolis.spec
new file mode 100644
index 0000000000000000000000000000000000000000..8529d62b9b7c6dfeec0e8d5c1364d431d91fca42
--- /dev/null
+++ b/centos2anolis.spec
@@ -0,0 +1,41 @@
+Name:           centos2anolis
+Version:        0.1
+Release:        1%{?dist}
+Summary:        Transfer CentOS to Anolis.
+
+License:        MIT
+URL:            www.openanolis.cn
+Source0:        %{name}.py
+Source1:        README.md
+Source2:        LICENSE.txt
+
+BuildRequires:  python3
+Requires:       python3
+Requires:       bash
+
+BuildArch:      noarch
+
+%description
+This script is designed to automatically convert a CentOS instance to 
+Anolis OS in-place. Currently it supports transferring from CentOS 7 
+to Anolis OS 7 and from CentOS 8 to Anolis OS 8.
+
+%prep
+cp %{SOURCE1} .
+cp %{SOURCE2} .
+
+
+%install
+mkdir -p %{buildroot}/%{_sbindir}
+install -m 755 %{SOURCE0} %{buildroot}/%{_sbindir}
+
+
+%files
+%{_sbindir}/%{name}.py
+%doc README.md
+%license LICENSE.txt
+
+
+%changelog
+* Wed Dec 22 2021 mgb0110571 <mgb01105731@alibaba-inc.com> - 0.1-1
+- First CentOS2Anolis Package