diff --git a/common/netutils/ip46.go b/common/netutils/ip46.go
index f246f6e..a9498f0 100644
--- a/common/netutils/ip46.go
+++ b/common/netutils/ip46.go
@@ -10,6 +10,7 @@ import (
 	"errors"
 	"fmt"
 	"github.com/mzz2017/softwind/netproxy"
+	"github.com/sirupsen/logrus"
 	"golang.org/x/net/dns/dnsmessage"
 	"net/netip"
 	"sync"
@@ -21,6 +22,17 @@ type Ip46 struct {
 }
 
 func ResolveIp46(ctx context.Context, dialer netproxy.Dialer, dns netip.AddrPort, host string, tcp bool, race bool) (ipv46 *Ip46, err error) {
+	var log *logrus.Logger
+	if _log := ctx.Value("logger"); _log != nil {
+		log = _log.(*logrus.Logger)
+		defer func() {
+			if err == nil {
+				log.Tracef("ResolveIp46 %v using %v: A(%v) AAAA(%v)", host, systemDns, ipv46.Ip4, ipv46.Ip6)
+			} else {
+				log.Tracef("ResolveIp46 %v using %v: %v", host, systemDns, err)
+			}
+		}()
+	}
 	var wg sync.WaitGroup
 	wg.Add(2)
 	var err4, err6 error
diff --git a/component/outbound/dialer/alive_dialer_set.go b/component/outbound/dialer/alive_dialer_set.go
index fbd13a5..f7285a8 100644
--- a/component/outbound/dialer/alive_dialer_set.go
+++ b/component/outbound/dialer/alive_dialer_set.go
@@ -7,9 +7,9 @@ package dialer
 
 import (
 	"fmt"
+	"github.com/daeuniverse/dae/common/consts"
 	"github.com/mzz2017/softwind/pkg/fastrand"
 	"github.com/sirupsen/logrus"
-	"github.com/daeuniverse/dae/common/consts"
 	"strings"
 	"sync"
 	"time"
@@ -138,10 +138,8 @@ func (a *AliveDialerSet) NotifyLatencyChange(dialer *Dialer, alive bool) {
 			// Dialer: not alive -> alive.
 			if index == -NotAlive {
 				a.log.WithFields(logrus.Fields{
-					"dialer":  dialer.property.Name,
-					"group":   a.dialerGroupName,
-					"network": a.CheckTyp.StringWithoutDns(),
-				}).Infoln("NOT ALIVE -> ALIVE:")
+					"group": a.dialerGroupName,
+				}).Infof("[NOT ALIVE --%v-> ALIVE] %v", a.CheckTyp.String(), dialer.property.Name)
 			}
 			a.dialerToIndex[dialer] = len(a.inorderedAliveDialerSet)
 			a.inorderedAliveDialerSet = append(a.inorderedAliveDialerSet, dialer)
@@ -151,10 +149,8 @@ func (a *AliveDialerSet) NotifyLatencyChange(dialer *Dialer, alive bool) {
 		if index >= 0 {
 			// Dialer: alive -> not alive.
 			a.log.WithFields(logrus.Fields{
-				"dialer":  dialer.property.Name,
-				"group":   a.dialerGroupName,
-				"network": a.CheckTyp.StringWithoutDns(),
-			}).Infoln("ALIVE -> NOT ALIVE:")
+				"group": a.dialerGroupName,
+			}).Infof("[ALIVE --%v-> NOT ALIVE] %v", a.CheckTyp.String(), dialer.property.Name)
 			// Remove the dialer from inorderedAliveDialerSet.
 			if index >= len(a.inorderedAliveDialerSet) {
 				a.log.Panicf("index:%v >= len(a.inorderedAliveDialerSet):%v", index, len(a.inorderedAliveDialerSet))
diff --git a/component/outbound/dialer/connectivity_check.go b/component/outbound/dialer/connectivity_check.go
index db5b244..2c373d7 100644
--- a/component/outbound/dialer/connectivity_check.go
+++ b/component/outbound/dialer/connectivity_check.go
@@ -167,6 +167,7 @@ func ParseCheckDnsOption(ctx context.Context, dnsHostPort string) (opt *CheckDns
 type TcpCheckOptionRaw struct {
 	opt *TcpCheckOption
 	mu  sync.Mutex
+	Log *logrus.Logger
 	Raw string
 }
 
@@ -176,6 +177,7 @@ func (c *TcpCheckOptionRaw) Option() (opt *TcpCheckOption, err error) {
 	if c.opt == nil {
 		ctx, cancel := context.WithTimeout(context.TODO(), 10*time.Second)
 		defer cancel()
+		ctx = context.WithValue(ctx, "logger", c.Log)
 		tcpCheckOption, err := ParseTcpCheckOption(ctx, c.Raw)
 		if err != nil {
 			return nil, fmt.Errorf("failed to parse tcp_check_url: %w", err)
@@ -238,6 +240,7 @@ func (d *Dialer) aliveBackground() {
 			if !opt.Ip4.IsValid() {
 				d.Log.WithFields(logrus.Fields{
 					"link":    d.TcpCheckOptionRaw.Raw,
+					"dialer":  d.property.Name,
 					"network": typ.String(),
 				}).Debugln("Skip check due to no DNS record.")
 				return false, nil
@@ -259,6 +262,7 @@ func (d *Dialer) aliveBackground() {
 			if !opt.Ip6.IsValid() {
 				d.Log.WithFields(logrus.Fields{
 					"link":    d.TcpCheckOptionRaw.Raw,
+					"dialer":  d.property.Name,
 					"network": typ.String(),
 				}).Debugln("Skip check due to no DNS record.")
 				return false, nil
@@ -280,6 +284,7 @@ func (d *Dialer) aliveBackground() {
 			if !opt.Ip4.IsValid() {
 				d.Log.WithFields(logrus.Fields{
 					"link":    d.CheckDnsOptionRaw.Raw,
+					"dialer":  d.property.Name,
 					"network": typ.String(),
 				}).Debugln("Skip check due to no DNS record.")
 				return false, nil
@@ -301,6 +306,7 @@ func (d *Dialer) aliveBackground() {
 			if !opt.Ip6.IsValid() {
 				d.Log.WithFields(logrus.Fields{
 					"link":    d.CheckDnsOptionRaw.Raw,
+					"dialer":  d.property.Name,
 					"network": typ.String(),
 				}).Debugln("Skip check due to no DNS record.")
 				return false, nil
@@ -523,9 +529,16 @@ func (d *Dialer) HttpCheck(ctx context.Context, u *netutils.URL, ip netip.Addr)
 	defer resp.Body.Close()
 	// Judge the status code.
 	if page := path.Base(req.URL.Path); strings.HasPrefix(page, "generate_") {
-		return strconv.Itoa(resp.StatusCode) == strings.TrimPrefix(page, "generate_"), nil
+		if strconv.Itoa(resp.StatusCode) != strings.TrimPrefix(page, "generate_") {
+			return false, fmt.Errorf("unexpected status code: %v", resp.StatusCode)
+		}
+		return true, nil
+	} else {
+		if resp.StatusCode < 200 || resp.StatusCode >= 500 {
+			return false, fmt.Errorf("bad status code: %v", resp.StatusCode)
+		}
+		return true, nil
 	}
-	return resp.StatusCode >= 200 && resp.StatusCode < 500, nil
 }
 
 func (d *Dialer) DnsCheck(ctx context.Context, dns netip.AddrPort, tcp bool) (ok bool, err error) {
diff --git a/component/outbound/dialer_group_test.go b/component/outbound/dialer_group_test.go
index 6f33e4a..e770b94 100644
--- a/component/outbound/dialer_group_test.go
+++ b/component/outbound/dialer_group_test.go
@@ -6,10 +6,10 @@
 package outbound
 
 import (
-	"github.com/mzz2017/softwind/pkg/fastrand"
 	"github.com/daeuniverse/dae/common/consts"
 	"github.com/daeuniverse/dae/component/outbound/dialer"
 	"github.com/daeuniverse/dae/pkg/logger"
+	"github.com/mzz2017/softwind/pkg/fastrand"
 	"testing"
 	"time"
 )
@@ -43,7 +43,7 @@ func TestDialerGroup_Select_Fixed(t *testing.T) {
 	g := NewDialerGroup(option, "test-group", dialers, DialerSelectionPolicy{
 		Policy:     consts.DialerSelectionPolicy_Fixed,
 		FixedIndex: fixedIndex,
-	}, func(alive bool, networkType *dialer.NetworkType) {})
+	}, func(alive bool, networkType *dialer.NetworkType, isInit bool) {})
 	for i := 0; i < 10; i++ {
 		d, _, err := g.Select(TestNetworkType)
 		if err != nil {
@@ -90,7 +90,7 @@ func TestDialerGroup_Select_MinLastLatency(t *testing.T) {
 	}
 	g := NewDialerGroup(option, "test-group", dialers, DialerSelectionPolicy{
 		Policy: consts.DialerSelectionPolicy_MinLastLatency,
-	}, func(alive bool, networkType *dialer.NetworkType) {})
+	}, func(alive bool, networkType *dialer.NetworkType, isInit bool) {})
 
 	// Test 1000 times.
 	for i := 0; i < 1000; i++ {
@@ -155,7 +155,7 @@ func TestDialerGroup_Select_Random(t *testing.T) {
 	}
 	g := NewDialerGroup(option, "test-group", dialers, DialerSelectionPolicy{
 		Policy: consts.DialerSelectionPolicy_Random,
-	}, func(alive bool, networkType *dialer.NetworkType) {})
+	}, func(alive bool, networkType *dialer.NetworkType, isInit bool) {})
 	count := make([]int, len(dialers))
 	for i := 0; i < 100; i++ {
 		d, _, err := g.Select(TestNetworkType)
@@ -195,7 +195,7 @@ func TestDialerGroup_SetAlive(t *testing.T) {
 	}
 	g := NewDialerGroup(option, "test-group", dialers, DialerSelectionPolicy{
 		Policy: consts.DialerSelectionPolicy_Random,
-	}, func(alive bool, networkType *dialer.NetworkType) {})
+	}, func(alive bool, networkType *dialer.NetworkType, isInit bool) {})
 	zeroTarget := 3
 	g.MustGetAliveDialerSet(TestNetworkType).NotifyLatencyChange(dialers[zeroTarget], false)
 	count := make([]int, len(dialers))
diff --git a/component/routing/domain_matcher/ahocorasick_slimtrie_test.go b/component/routing/domain_matcher/ahocorasick_slimtrie_test.go
index 8c85045..4824da7 100644
--- a/component/routing/domain_matcher/ahocorasick_slimtrie_test.go
+++ b/component/routing/domain_matcher/ahocorasick_slimtrie_test.go
@@ -6,8 +6,8 @@
 package domain_matcher
 
 import (
-	"github.com/sirupsen/logrus"
 	"github.com/daeuniverse/dae/common/consts"
+	"github.com/sirupsen/logrus"
 	"golang.org/x/exp/slices"
 	"math/rand"
 	"testing"
@@ -21,7 +21,7 @@ func TestAhocorasickSlimtrie(t *testing.T) {
 		t.Fatal(err)
 	}
 	bf := NewBruteforce(consts.MaxMatchSetLen)
-	actrie := NewAhocorasickSlimtrie(consts.MaxMatchSetLen)
+	actrie := NewAhocorasickSlimtrie(logrus.StandardLogger(), consts.MaxMatchSetLen)
 	for _, domains := range simulatedDomainSet {
 		bf.AddSet(domains.RuleIndex, domains.Domains, domains.Key)
 		actrie.AddSet(domains.RuleIndex, domains.Domains, domains.Key)
diff --git a/control/control_plane.go b/control/control_plane.go
index b475007..63d7ec4 100644
--- a/control/control_plane.go
+++ b/control/control_plane.go
@@ -220,7 +220,7 @@ func NewControlPlane(
 	}
 	option := &dialer.GlobalOption{
 		Log:               log,
-		TcpCheckOptionRaw: dialer.TcpCheckOptionRaw{Raw: global.TcpCheckUrl},
+		TcpCheckOptionRaw: dialer.TcpCheckOptionRaw{Raw: global.TcpCheckUrl, Log: log},
 		CheckDnsOptionRaw: dialer.CheckDnsOptionRaw{Raw: global.UdpCheckDns},
 		CheckInterval:     global.CheckInterval,
 		CheckTolerance:    global.CheckTolerance,
diff --git a/control/dns_control.go b/control/dns_control.go
index ea0edc9..8f74291 100644
--- a/control/dns_control.go
+++ b/control/dns_control.go
@@ -312,10 +312,11 @@ func (c *DnsController) Handle_(dnsMessage *dnsmessage.Message, req *udpRequest)
 		return nil
 	}
 
-	// Make sure there is additional record OPT in the request to filter DNS rush-answer in the response process.
-	// Because rush-answer has no resp OPT. We can distinguish them from multiple responses.
-	// Note that additional record OPT may not be supported by home router either.
-	_, _ = EnsureAdditionalOpt(dnsMessage, true)
+	//// NOTICE: Rush-answer detector was removed because it does not always work in all districts.
+	//// Make sure there is additional record OPT in the request to filter DNS rush-answer in the response process.
+	//// Because rush-answer has no resp OPT. We can distinguish them from multiple responses.
+	//// Note that additional record OPT may not be supported by home router either.
+	//_, _ = EnsureAdditionalOpt(dnsMessage, true)
 
 	// Route request.
 	upstream, err := c.routing.RequestSelect(dnsMessage)
@@ -382,13 +383,17 @@ func (c *DnsController) dialSend(req *udpRequest, data []byte, id uint16, upstre
 
 	// dnsRespHandler caches dns response and check rush answers.
 	dnsRespHandler := c.DnsRespHandlerFactory(func(from netip.AddrPort) bool {
-		// We only validate rush-ans when outbound is direct and pkt does not send to a home device.
-		// Because additional record OPT may not be supported by home router.
-		// So se should trust home devices even if they make rush-answer (or looks like).
-		return dialArgument.bestDialer.Property().Name == "direct" &&
-			!from.Addr().IsPrivate() &&
-			!from.Addr().IsLoopback() &&
-			!from.Addr().IsUnspecified()
+		//// NOTICE: Rush-answer detector was removed because it does not always work in all districts.
+		//// We only validate rush-ans when outbound is direct and pkt does not send to a home device.
+		//// Because additional record OPT may not be supported by home router.
+		//// So se should trust home devices even if they make rush-answer (or looks like).
+		//return dialArgument.bestDialer.Property().Name == "direct" &&
+		//	!from.Addr().IsPrivate() &&
+		//	!from.Addr().IsLoopback() &&
+		//	!from.Addr().IsUnspecified()
+
+		// Do not validate rush-answer.
+		return false
 	})
 	// Dial and send.
 	var respMsg *dnsmessage.Message
@@ -456,12 +461,12 @@ func (c *DnsController) dialSend(req *udpRequest, data []byte, id uint16, upstre
 			if err != nil {
 				return fmt.Errorf("failed to read from: %v (dialer: %v): %w", dialArgument.bestTarget, dialArgument.bestDialer.Property().Name, err)
 			}
-			cancelDnsReqCtx()
 			respMsg, err = dnsRespHandler(respBuf[:n], dialArgument.bestTarget)
 			if err != nil {
 				return err
 			}
 			if respMsg != nil {
+				cancelDnsReqCtx()
 				break
 			}
 		}