diff --git a/ui/src/components/provider/CAProviderSelect.tsx b/ui/src/components/provider/CAProviderSelect.tsx
index 37c3c9f4..159db0c9 100644
--- a/ui/src/components/provider/CAProviderSelect.tsx
+++ b/ui/src/components/provider/CAProviderSelect.tsx
@@ -1,9 +1,11 @@
 import { useMemo } from "react";
 import { useTranslation } from "react-i18next";
-import { useControllableValue } from "ahooks";
+import { useControllableValue, useMount } from "ahooks";
 import { Avatar, Select, Typography, theme } from "antd";
 
 import { type CAProvider, caProvidersMap } from "@/domain/provider";
+import { useZustandShallowSelector } from "@/hooks";
+import { useSSLProviderSettingsStore } from "@/stores/settings";
 
 import { type SharedSelectProps, useSelectDataSource } from "./_shared";
 
@@ -17,12 +19,20 @@ const CAProviderSelect = ({ showAvailability, showDefault, onFilter, ...props }:
 
   const { token: themeToken } = theme.useToken();
 
+  const { settings: sslProviderSettings, loadSettings: loadSSLProviderSettings } = useSSLProviderSettingsStore(
+    useZustandShallowSelector(["settings", "loadSettings"])
+  );
+  useMount(() => loadSSLProviderSettings(false));
+
   const [value, setValue] = useControllableValue<string | undefined>(props, {
     valuePropName: "value",
     defaultValuePropName: "defaultValue",
     trigger: "onChange",
   });
 
+  const defaultCAProvider = useMemo(() => {
+    return caProvidersMap.get(sslProviderSettings.provider);
+  }, [sslProviderSettings]);
   const dataSources = useSelectDataSource({
     dataSource: Array.from(caProvidersMap.values()),
     filters: [onFilter!],
@@ -54,22 +64,27 @@ const CAProviderSelect = ({ showAvailability, showDefault, onFilter, ...props }:
       },
     ].filter((group) => group.options.length > 0);
 
-    const temp = showAvailability
+    return showAvailability
       ? showDefault
         ? [{ label: t("provider.text.default_group"), options: [defaultOption] }, ...groupOptions]
         : groupOptions
       : showDefault
         ? [defaultOption, ...plainOptions]
         : plainOptions;
-
-    return temp;
   }, [showAvailability, showDefault, dataSources]);
 
   const renderOption = (key: string) => {
     if (key === "") {
       return (
-        <div className="truncate">
-          <Typography.Text ellipsis>{showAvailability ? t("provider.text.default_ca_in_group") : t("provider.text.default_ca")}</Typography.Text>
+        <div className="flex items-center justify-between gap-4">
+          <div className="flex-1 truncate">
+            <Typography.Text ellipsis>{showAvailability ? t("provider.text.default_ca_in_group") : t("provider.text.default_ca")}</Typography.Text>
+          </div>
+          {defaultCAProvider && (
+            <Typography.Text className="text-xs" type="secondary" ellipsis>
+              {t(defaultCAProvider.name)}
+            </Typography.Text>
+          )}
         </div>
       );
     }
diff --git a/ui/src/components/workflow/designer/forms/BizApplyNodeConfigForm.tsx b/ui/src/components/workflow/designer/forms/BizApplyNodeConfigForm.tsx
index 755b9f3b..daddada6 100644
--- a/ui/src/components/workflow/designer/forms/BizApplyNodeConfigForm.tsx
+++ b/ui/src/components/workflow/designer/forms/BizApplyNodeConfigForm.tsx
@@ -510,7 +510,29 @@ const BizApplyNodeConfigForm = ({ node, ...props }: BizApplyNodeConfigFormProps)
             rules={[formRule]}
             tooltip={<span dangerouslySetInnerHTML={{ __html: t("workflow_node.apply.form.preferred_chain.tooltip") }}></span>}
           >
-            <Input allowClear placeholder={t("workflow_node.apply.form.preferred_chain.placeholder")} />
+            <AutoComplete
+              allowClear
+              options={[
+                {
+                  ca: "Let's Encrypt",
+                  roots: ["ISRG", "ISRG Root X1", "ISRG Root X2"],
+                },
+                {
+                  ca: "Google Trust Services",
+                  roots: ["GTS", "GTS Root R1", "GTS Root R2", "GTS Root R3", "GTS Root R4", "GlobalSign", "GlobalSign R4"],
+                },
+              ].map((e) => ({
+                label: e.ca,
+                options: e.roots.map((s) => ({
+                  label: s,
+                  value: s,
+                })),
+              }))}
+              placeholder={t("workflow_node.apply.form.preferred_chain.placeholder")}
+              showSearch={{
+                filterOption: (inputValue, option) => "value" in option! && String(option.value).toLowerCase().includes(inputValue.toLowerCase()),
+              }}
+            />
           </Form.Item>
 
           <Form.Item
@@ -522,10 +544,21 @@ const BizApplyNodeConfigForm = ({ node, ...props }: BizApplyNodeConfigFormProps)
           >
             <AutoComplete
               allowClear
-              options={["classic", "tlsserver", "shortlived"].map((s) => ({ value: s }))}
+              options={[
+                {
+                  ca: "Let's Encrypt",
+                  profiles: ["classic", "tlsserver", "shortlived"],
+                },
+              ].map((e) => ({
+                label: e.ca,
+                options: e.profiles.map((s) => ({
+                  label: s,
+                  value: s,
+                })),
+              }))}
               placeholder={t("workflow_node.apply.form.acme_profile.placeholder")}
               showSearch={{
-                filterOption: (inputValue, option) => option!.value.toLowerCase().includes(inputValue.toLowerCase()),
+                filterOption: (inputValue, option) => "value" in option! && String(option.value).toLowerCase().includes(inputValue.toLowerCase()),
               }}
             />
           </Form.Item>
@@ -715,13 +748,14 @@ const InternalEmailInput = memo(
         backfill
         defaultValue={value}
         disabled={disabled}
-        filterOption
         options={options}
         placeholder={placeholder}
-        showSearch
+        showSearch={{
+          filterOption: true,
+          onSearch: handleSearch,
+        }}
         value={value}
         onChange={handleChange}
-        onSearch={handleSearch}
       />
     );
   }