diff --git a/trunk/src/app/srs_app_rtc_conn.cpp b/trunk/src/app/srs_app_rtc_conn.cpp
index dffd10b6e..1b3329fe7 100644
--- a/trunk/src/app/srs_app_rtc_conn.cpp
+++ b/trunk/src/app/srs_app_rtc_conn.cpp
@@ -61,7 +61,6 @@ using namespace std;
 #include <srs_protocol_kbps.hpp>
 
 SrsPps* _srs_pps_sstuns = new SrsPps(_srs_clock);
-SrsPps* _srs_pps_stwcc = new SrsPps(_srs_clock);
 SrsPps* _srs_pps_srtcps = new SrsPps(_srs_clock);
 SrsPps* _srs_pps_srtps = new SrsPps(_srs_clock);
 
@@ -1300,7 +1299,7 @@ srs_error_t SrsRtcPublishStream::send_periodic_twcc()
         return err;
     }
 
-    ++_srs_pps_stwcc->sugar;
+    ++_srs_pps_srtcps->sugar;
 
     char pkt[kRtcpPacketSize];
     SrsBuffer *buffer = new SrsBuffer(pkt, sizeof(pkt));
diff --git a/trunk/src/app/srs_app_rtc_server.cpp b/trunk/src/app/srs_app_rtc_server.cpp
index 49782d401..67698172f 100644
--- a/trunk/src/app/srs_app_rtc_server.cpp
+++ b/trunk/src/app/srs_app_rtc_server.cpp
@@ -54,7 +54,6 @@ extern SrsPps* _srs_pps_fast_addrs;
 
 extern SrsPps* _srs_pps_spkts;
 extern SrsPps* _srs_pps_sstuns;
-extern SrsPps* _srs_pps_stwcc;
 extern SrsPps* _srs_pps_srtcps;
 extern SrsPps* _srs_pps_srtps;
 
@@ -73,6 +72,8 @@ extern SrsPps* _srs_pps_svnack;
 
 extern SrsPps* _srs_pps_rnack;
 extern SrsPps* _srs_pps_rnack2;
+extern SrsPps* _srs_pps_rhnack;
+extern SrsPps* _srs_pps_rmnack;
 
 SrsRtcBlackhole::SrsRtcBlackhole()
 {
@@ -675,22 +676,22 @@ srs_error_t SrsRtcServer::notify(int type, srs_utime_t interval, srs_utime_t tic
     }
 
     // Update the pps stat for UDP socket and adddresses.
-    _srs_pps_rpkts->update(); _srs_pps_rrtps->update(); _srs_pps_rstuns->update(); _srs_pps_rrtcps->update(); _srs_pps_addrs->update(); _srs_pps_fast_addrs->update();
-    _srs_pps_spkts->update(); _srs_pps_srtps->update(); _srs_pps_sstuns->update(); _srs_pps_stwcc->update(); _srs_pps_srtcps->update();
-    _srs_pps_ids->update(); _srs_pps_fids->update(); _srs_pps_fids_level0->update();
+    _srs_pps_rpkts->update(); _srs_pps_rrtps->update(); _srs_pps_rstuns->update(); _srs_pps_rrtcps->update();
+    _srs_pps_spkts->update(); _srs_pps_srtps->update(); _srs_pps_sstuns->update(); _srs_pps_srtcps->update();
     _srs_pps_pli->update(); _srs_pps_twcc->update(); _srs_pps_rr->update();
     _srs_pps_snack->update(); _srs_pps_snack2->update(); _srs_pps_sanack->update(); _srs_pps_svnack->update();
-    _srs_pps_rnack->update(); _srs_pps_rnack2->update();
+    _srs_pps_rnack->update(); _srs_pps_rnack2->update(); _srs_pps_rhnack->update(); _srs_pps_rmnack->update();
+    _srs_pps_ids->update(); _srs_pps_fids->update(); _srs_pps_fids_level0->update(); _srs_pps_addrs->update(); _srs_pps_fast_addrs->update();
 
     // TODO: FIXME: Show more data for RTC server.
-    srs_trace("RTC: Server conns=%u, rpkts=%d,%d,%d,%d,%d,%d, spkts=%d,%d,%d,%d,%d, fid=%d,%d,%d, rtcp=%d,%d,%d, snk=%d,%d,%d,%d, rnk=%d,%d",
+    srs_trace("RTC: Server conns=%u, rpkts=%d,%d,%d,%d, spkts=%d,%d,%d,%d, rtcp=%d,%d,%d, snk=%d,%d,%d,%d, rnk=%d,%d,%d,%d, fid=%d,%d,%d,%d,%d",
         nn_rtc_conns,
-        _srs_pps_rpkts->r10s(), _srs_pps_rrtps->r10s(), _srs_pps_rstuns->r10s(), _srs_pps_rrtcps->r10s(), _srs_pps_addrs->r10s(), _srs_pps_fast_addrs->r10s(),
-        _srs_pps_spkts->r10s(), _srs_pps_srtps->r10s(), _srs_pps_sstuns->r10s(), _srs_pps_stwcc->r10s(), _srs_pps_srtcps->r10s(),
-        _srs_pps_ids->r10s(), _srs_pps_fids->r10s(), _srs_pps_fids_level0->r10s(),
+        _srs_pps_rpkts->r10s(), _srs_pps_rrtps->r10s(), _srs_pps_rstuns->r10s(), _srs_pps_rrtcps->r10s(),
+        _srs_pps_spkts->r10s(), _srs_pps_srtps->r10s(), _srs_pps_sstuns->r10s(), _srs_pps_srtcps->r10s(),
         _srs_pps_pli->r10s(), _srs_pps_twcc->r10s(), _srs_pps_rr->r10s(),
-        _srs_pps_snack->r10s(), _srs_pps_snack2->r10s(), _srs_pps_sanack->r10s(), _srs_pps_svnack->r10s(),
-        _srs_pps_rnack->r10s(), _srs_pps_rnack2->r10s()
+        _srs_pps_snack->r10s(), _srs_pps_sanack->r10s(), _srs_pps_svnack->r10s(), _srs_pps_snack2->r10s(),
+        _srs_pps_rnack->r10s(), _srs_pps_rnack2->r10s(), _srs_pps_rhnack->r10s(), _srs_pps_rmnack->r10s(),
+        _srs_pps_ids->r10s(), _srs_pps_fids->r10s(), _srs_pps_fids_level0->r10s(), _srs_pps_addrs->r10s(), _srs_pps_fast_addrs->r10s()
     );
 
     return err;
diff --git a/trunk/src/app/srs_app_rtc_source.cpp b/trunk/src/app/srs_app_rtc_source.cpp
index 5adb0c905..eb5d30f20 100644
--- a/trunk/src/app/srs_app_rtc_source.cpp
+++ b/trunk/src/app/srs_app_rtc_source.cpp
@@ -58,6 +58,8 @@ SrsPps* _srs_pps_svnack = new SrsPps(_srs_clock);
 
 SrsPps* _srs_pps_rnack = new SrsPps(_srs_clock);
 SrsPps* _srs_pps_rnack2 = new SrsPps(_srs_clock);
+SrsPps* _srs_pps_rhnack = new SrsPps(_srs_clock);
+SrsPps* _srs_pps_rmnack = new SrsPps(_srs_clock);
 
 // Firefox defaults as 109, Chrome is 111.
 const int kAudioPayloadType     = 111;
@@ -2002,8 +2004,10 @@ SrsRtpPacket2* SrsRtcSendTrack::fetch_rtp_packet(uint16_t seq)
     // For NACK, it sequence must match exactly, or it cause SRTP fail.
     // Return packet only when sequence is equal.
     if (pkt->header.get_sequence() == seq) {
+        ++_srs_pps_rhnack->sugar;
         return pkt;
     }
+    ++_srs_pps_rmnack->sugar;
 
     // Ignore if sequence not match.
     uint32_t nn = 0;