diff --git a/README.md b/README.md
index 7a81422..bb17f2a 100644
--- a/README.md
+++ b/README.md
@@ -82,6 +82,12 @@ curl http://localhost:2023/tc/api/v1/config/raw -X POST -d 'ls'
 #{"code":100,"data":"invalid cmd ls"}
 ```
 
+For TC command, see:
+
+* [Set traffic control (tcset command)](https://tcconfig.readthedocs.io/en/latest/pages/usage/tcset/index.html)
+* [Delete traffic control (tcdel command)](https://tcconfig.readthedocs.io/en/latest/pages/usage/tcdel/index.html)
+* [Display traffic control configurations (tcshow command)](https://tcconfig.readthedocs.io/en/latest/pages/usage/tcshow/index.html)
+
 ## Development in macOS
 
 Build UI:
diff --git a/main.go b/main.go
index eceed69..6fe9d57 100644
--- a/main.go
+++ b/main.go
@@ -15,7 +15,7 @@ import (
 	"strings"
 )
 
-const version = "1.0.4"
+const version = "1.0.5"
 
 func main() {
 	ctx := logger.WithContext(context.Background())
diff --git a/tc.go b/tc.go
index 29acba1..4cf8338 100644
--- a/tc.go
+++ b/tc.go
@@ -333,7 +333,7 @@ func (v *NetworkOptions) Execute(ctx context.Context) error {
 	if v.identifyKey != "all" && v.identifyValue == "" {
 		return errors.Errorf("no identifyValue for identifyKey=%v", v.identifyKey)
 	}
-	if v.identifyKey != "all" && v.identifyKey != "serverPort" && v.identifyKey != "clientPort" && v.identifyKey != "clientIP" {
+	if v.identifyKey != "all" && v.identifyKey != "serverPort" && v.identifyKey != "clientPort" && v.identifyKey != "clientIp" {
 		return errors.Errorf("invalid identifyKey=%v", v.identifyKey)
 	}
 	if v.strategy == "" {
diff --git a/ui/src/components/NetFilter.js b/ui/src/components/NetFilter.js
index 63fbe9b..073bd33 100644
--- a/ui/src/components/NetFilter.js
+++ b/ui/src/components/NetFilter.js
@@ -1,12 +1,10 @@
 import React from "react";
 import {Col, Form, InputGroup, Row} from "react-bootstrap";
 
-export default function NetFilter({onChange, gIfaces}) {
-  const [iface, setIface] = React.useState();
-  const [protocol, setProtocol] = React.useState('ip');
-  const [direction, setDirection] = React.useState('incoming');
-  const [identifyKey, setIdentifyKey] = React.useState('all');
-  const [identifyValue, setIdentifyValue] = React.useState();
+export default function NetFilter({gIfaces,
+    iface, setIface, protocol, setProtocol, direction,
+    setDirection, identifyKey, setIdentifyKey, identifyValue, setIdentifyValue,
+  }) {
   const [ivVisible, setIvVisible] = React.useState(false);
   const [ivLabel, setIvLabel] = React.useState('IP');
 
@@ -17,10 +15,6 @@ export default function NetFilter({onChange, gIfaces}) {
     setIvLabel(nv === "clientIp" ? 'IP' : '端口');
   }, [setIdentifyKey, setIvLabel, setIvVisible]);
 
-  React.useEffect(() => {
-    onChange && onChange(iface, protocol, direction, identifyKey, identifyValue);
-  }, [iface, protocol, direction, identifyKey, identifyValue, onChange]);
-
   return (
     <Row>
       <Col xs='auto'>
@@ -89,7 +83,7 @@ export default function NetFilter({onChange, gIfaces}) {
             <Form.Text> * 请输入{ivLabel}</Form.Text>
             <InputGroup hasValidation>
               <Form.Control
-                required type="input" placeholder={`请输入匹配的${ivLabel}`}
+                required type="input" placeholder={`请输入匹配的${ivLabel}`} defaultValue={identifyValue}
                 onChange={(e) => setIdentifyValue(e.target.value)}
               />
               <Form.Control.Feedback type='invalid' tooltip>请输入{ivLabel}</Form.Control.Feedback>
diff --git a/ui/src/pages/SingleStategy.js b/ui/src/pages/SingleStategy.js
index faca62c..56b5fb4 100644
--- a/ui/src/pages/SingleStategy.js
+++ b/ui/src/pages/SingleStategy.js
@@ -6,6 +6,7 @@ import NetFilter from "../components/NetFilter";
 import {TcConfigQuery} from "../components/TcConfigQuery";
 import axios from "axios";
 import {useErrorHandler} from "react-error-boundary";
+import {SimpleStrategyStorage} from "../utils";
 
 export default function SingleStategy() {
   const [scanPanels, setScanPanels] = React.useState([0]);
@@ -35,10 +36,15 @@ export default function SingleStategy() {
     setScanPanels([ref.current.scanPanels.length, ...ref.current.scanPanels]);
   }, [setScanPanels, ref]);
 
+  // Load filter and strategy from storage.
+  const defaultFilter = SimpleStrategyStorage.loadFilter() || {};
+  const defaultStrategy = SimpleStrategyStorage.loadStrategy() || {};
+  console.log(`load filter=${JSON.stringify(defaultFilter)}, strategy=${JSON.stringify(defaultStrategy)}`);
+
   return <TcErrorBoundary>
     <Container fluid={true}>
       <TcErrorBoundary>
-        <SingleStategySetting/>
+        <SingleStategySetting defaultFilter={defaultFilter} defaultStrategy={defaultStrategy}/>
         <p/>
         {scanPanels?.length && scanPanels.map(e => {
           return <React.Fragment key={e}>
@@ -56,22 +62,22 @@ export default function SingleStategy() {
   </TcErrorBoundary>;
 }
 
-function SingleStategySetting() {
+function SingleStategySetting({defaultFilter, defaultStrategy}) {
   const [executing, setExecuting] = React.useState(false);
   const [refresh, setRefresh] = React.useState(0);
   const [validated, setValidated] = React.useState(false);
   const handleError = useErrorHandler();
 
-  const [iface, setIface] = React.useState();
-  const [protocol, setProtocol] = React.useState();
-  const [direction, setDirection] = React.useState();
-  const [identifyKey, setIdentifyKey] = React.useState();
-  const [identifyValue, setIdentifyValue] = React.useState();
-  const [strategy, setStrategy] = React.useState();
-  const [loss, setLoss] = React.useState();
-  const [delay, setDelay] = React.useState();
-  const [rate, setRate] = React.useState();
-  const [delayDistro, setDelayDistro] = React.useState();
+  const [iface, setIface] = React.useState(defaultFilter.iface);
+  const [protocol, setProtocol] = React.useState(defaultFilter.protocol || 'ip');
+  const [direction, setDirection] = React.useState(defaultFilter.direction || 'incoming');
+  const [identifyKey, setIdentifyKey] = React.useState(defaultFilter.identifyKey || 'all');
+  const [identifyValue, setIdentifyValue] = React.useState(defaultFilter.identifyValue);
+  const [strategy, setStrategy] = React.useState(defaultStrategy.strategy || 'loss');
+  const [loss, setLoss] = React.useState(defaultStrategy.loss || '1');
+  const [delay, setDelay] = React.useState(defaultStrategy.delay || '1');
+  const [rate, setRate] = React.useState(defaultStrategy.rate || '1000000');
+  const [delayDistro, setDelayDistro] = React.useState(defaultStrategy.delayDistro);
 
   const [gIfaces, setGIfaces] = React.useState();
   const [ifbs, setIfbs] = React.useState();
@@ -97,28 +103,6 @@ function SingleStategySetting() {
     });
   }, [refresh, setIfbs, setGIfaces]);
 
-  // When user change filters.
-  const updateFilter = React.useCallback((iface, protocol, direction, identifyKey, identifyValue) => {
-    setIface(iface);
-    setProtocol(protocol);
-    setDirection(direction);
-    setIdentifyKey(identifyKey);
-    setIdentifyValue(identifyValue);
-    console.log(`update filter iface=${iface}, protocol=${protocol}, direction=${direction}, identify=${identifyKey}/${identifyValue}`)
-  }, [setIface, setProtocol, setDirection, setIdentifyKey, setIdentifyValue]);
-
-  // When user change strategy.
-  const updateStategy = React.useCallback((strategy, loss, delay, rate, delayDistro) => {
-    if (delayDistro && Number(delayDistro) > Number(delay)) return alert(`延迟抖动${delayDistro}不能大于延迟${delay}`);
-
-    setStrategy(strategy);
-    setLoss(loss);
-    setDelay(delay);
-    setRate(rate);
-    setDelayDistro(delayDistro);
-    console.log(`update strategy strategy=${strategy}, loss=${loss}, delay=${delay}, rate=${rate}, delayDistro=${delayDistro}`);
-  }, [setStrategy, setLoss, setDelay, setRate]);
-
   // Reset the TC config.
   const resetNetwork = React.useCallback((e) => {
     if (!iface) {
@@ -148,6 +132,10 @@ function SingleStategySetting() {
       return alert(`延迟抖动${delayDistro}不能大于延迟${delay}`);
     }
 
+    SimpleStrategyStorage.saveFilter(iface, protocol, direction, identifyKey, identifyValue);
+    SimpleStrategyStorage.saveStrategy(strategy, loss, delay, rate, delayDistro);
+    console.log(`save iface=${iface}, protocol=${protocol}, direction=${direction}, identify=${identifyKey}/${identifyValue}, strategy=${strategy}, loss=${loss}, delay=${delay}, rate=${rate}, delayDistro=${delayDistro}`);
+
     setExecuting(true);
     const queries = [
       iface ? `iface=${iface}` : null,
@@ -179,12 +167,19 @@ function SingleStategySetting() {
         <Form noValidate validated={validated}>
           <Row>
             <Col xs='auto'>
-              <NetFilter onChange={updateFilter} gIfaces={gIfaces}/>
+              {gIfaces && <NetFilter gIfaces={gIfaces}
+                         iface={iface} setIface={setIface} protocol={protocol} setProtocol={setProtocol}
+                         direction={direction} setDirection={setDirection} identifyKey={identifyKey}
+                         setIdentifyKey={setIdentifyKey} identifyValue={identifyValue}
+                         setIdentifyValue={setIdentifyValue}/>}
             </Col>
           </Row>
           <Row>
             <Col xs='auto'>
-              <StrategySetting onChange={updateStategy}/>
+              <StrategySetting strategy={strategy} setStrategy={setStrategy} loss={loss}
+                               setLoss={setLoss} delay={delay} setDelay={setDelay}
+                               rate={rate} setRate={setRate} delayDistro={delayDistro}
+                               setDelayDistro={setDelayDistro}/>
             </Col>
           </Row>
           <Row>
@@ -217,17 +212,9 @@ function SingleStategySetting() {
   </Accordion>;
 }
 
-function StrategySetting({onChange}) {
-  const [strategy, setStrategy] = React.useState('loss');
-  const [loss, setLoss] = React.useState('1');
-  const [delay, setDelay] = React.useState('1');
-  const [rate, setRate] = React.useState('1000000');
-  const [delayDistro, setDelayDistro] = React.useState();
-
-  React.useEffect(() => {
-    onChange && onChange(strategy, loss, delay, rate, delayDistro);
-  }, [strategy, loss, delay, rate, delayDistro, onChange]);
-
+function StrategySetting({
+    strategy, setStrategy, loss, setLoss, delay, setDelay, rate, setRate, delayDistro, setDelayDistro,
+  }) {
   return <Row>
     <Col xs='auto'>
       <Form.Group className="mb-3">
@@ -278,7 +265,7 @@ function StrategySetting({onChange}) {
         <Form.Label><b>延迟抖动</b></Form.Label>
         <Form.Text> * 可选, 延迟区间为[{Number(delay)-Number(delayDistro || 0)}, {Number(delay)+Number(delayDistro || 0)}]正态分布</Form.Text>
         <InputGroup className="mb-3">
-          <Form.Control
+          <Form.Control defaultValue={delayDistro}
             required type="input" placeholder={`请输入抖动的的值`}
             onChange={(e) => setDelayDistro(e.target.value)}
           />
diff --git a/ui/src/utils.js b/ui/src/utils.js
index 5576e93..a415793 100644
--- a/ui/src/utils.js
+++ b/ui/src/utils.js
@@ -4,7 +4,7 @@ export const Utils = {
   //    copy({id: 0}, ['msg': 'hi'])
   // Return an object:
   //    {id: 0, msg: 'hi'}
-  copy(from, extras) {
+  copy: (from, extras) => {
     let cp = Utils.merge({}, from);
 
     for (let i = 0; i < extras?.length; i += 2) {
@@ -19,7 +19,7 @@ export const Utils = {
     return cp;
   },
   // Merge two object, rewrite dst by src fields.
-  merge(dst, src) {
+  merge: (dst, src) => {
     if (typeof dst !== 'object') return src;
     if (typeof src !== 'object') return src;
 
@@ -33,3 +33,30 @@ export const Utils = {
     return cp;
   }
 };
+
+export const SimpleStrategyStorage = {
+  saveFilter: (iface, protocol, direction, identifyKey, identifyValue) => {
+    localStorage.setItem('TC_UI_SIMPLE_STRATEGY_FILTER', JSON.stringify({
+      iface, protocol, direction, identifyKey, identifyValue,
+    }));
+  },
+  loadFilter: () => {
+    const info = localStorage.getItem('TC_UI_SIMPLE_STRATEGY_FILTER');
+    return info ? JSON.parse(info) : null;
+  },
+  clearFilter: () => {
+    localStorage.removeItem('TC_UI_SIMPLE_STRATEGY_FILTER');
+  },
+  saveStrategy: (strategy, loss, delay, rate, delayDistro) => {
+    localStorage.setItem('TC_UI_SIMPLE_STRATEGY_STRATEGY', JSON.stringify({
+      strategy, loss, delay, rate, delayDistro,
+    }));
+  },
+  loadStrategy: () => {
+    const info = localStorage.getItem('TC_UI_SIMPLE_STRATEGY_STRATEGY');
+    return info ? JSON.parse(info) : null;
+  },
+  clearStrategy: () => {
+    localStorage.removeItem('TC_UI_SIMPLE_STRATEGY_STRATEGY');
+  }
+};