diff --git a/example/config.ini b/example/config.ini
index cfa759d6..4cd02fe0 100644
--- a/example/config.ini
+++ b/example/config.ini
@@ -163,7 +163,7 @@ output = ./ss.acl
 
 [job:ssacl]
 ssacl-geocn = true
-output = ./ss-gencn.acl
+output = ./ss-geocn.acl
 
 # ip输出
 [job:ip]
diff --git a/src/genpac/format/ip.py b/src/genpac/format/ip.py
index 37bd24df..a740548f 100644
--- a/src/genpac/format/ip.py
+++ b/src/genpac/format/ip.py
@@ -29,18 +29,18 @@ def iter_ip_cidr(self, family, cc):
         if family not in ['4', '6', 'all']:
             raise ValueError('IP family MUST BE: 4, 6, all')
         if family in ['4', 'all']:
-            yield from self._fetch_data(4, cc)
+            yield from self._fetch_ip_data(4, cc)
 
         if family in ['6', 'all']:
-            yield from self._fetch_data(6, cc)
+            yield from self._fetch_ip_data(6, cc)
 
     def iter_ip_range(self, family, cc):
         for d in self.iter_ip_cidr(family, cc):
-            yield str(IPAddress(d.first)), str(IPAddress(d.last))
+            yield IPAddress(d.first), IPAddress(d.last)
 
-    def _fetch_data(self, family, cc):
+    def _fetch_ip_data(self, family, cc):
         if cc.lower() == 'cn':
-            yield from self._fetch_data_cn(family)
+            yield from self._fetch_ip_data_cn(family)
             return
 
         expr = re.compile(f'^[0-9a-f:,]+,{cc}' if family == 6 else f'^[0-9\\.,]+,{cc}',
@@ -63,7 +63,7 @@ def _fetch_data(self, family, cc):
                 yield n
         logger.debug(f'IPv{family}[{cc}]: {count} => {size:.2e}')
 
-    def _fetch_data_cn(self, family):
+    def _fetch_ip_data_cn(self, family):
         url = _IP_DATA_ASN[int(family)]
         content = self.fetch(url)
         if not content:
diff --git a/src/genpac/format/shadowsocks_acl.py b/src/genpac/format/shadowsocks_acl.py
index 087bc934..b5518c1c 100644
--- a/src/genpac/format/shadowsocks_acl.py
+++ b/src/genpac/format/shadowsocks_acl.py
@@ -1,6 +1,5 @@
-from ..util import Namespace
-from .base import formater, FmtBase, TPL_LEAD_COMMENT
-from .ip import FmtIP
+from .base import formater, TPL_LEAD_COMMENT
+from .ip import IPInterface
 
 _TPL_DEF = f'''
 {TPL_LEAD_COMMENT}
@@ -20,7 +19,7 @@
 
 
 @formater('ssacl', desc='Shadowsocks访问控制列表')
-class FmtSSACL(FmtBase):
+class FmtSSACL(IPInterface):
     def __init__(self, *args, **kwargs):
         super().__init__(*args, **kwargs)
 
@@ -56,13 +55,7 @@ def _parse_rules(rules):
         return self.replace(self.tpl, replacements)
 
     def gen_by_geoip(self, replacements):
-        ip_data = []
-        for ip in self.fetch_cnips():
-            ip_data.append(ip)
+        ip_data = [str(ip) for ip in self.iter_ip_cidr(4, 'cn')]
         replacements.update({
             '__CNIPS__': '\n'.join(ip_data)})
         return self.replace(self.tpl, replacements)
-
-    def fetch_cnips(self):
-        gen_ip = FmtIP(generator=self.generator, options=Namespace(ip_family='4', ip_cc='cn'))
-        yield from gen_ip._fetch_data_cn(4)