diff --git a/README.md b/README.md
index ef3636dd4..5ae2d02ca 100755
--- a/README.md
+++ b/README.md
@@ -176,6 +176,7 @@ The ports used by SRS:
 
 ## V4 changes
 
+* v4.0, 2021-05-18, Fix [#2355][bug #2355]: GB28181: Fix play by RTC bug. 4.0.116
 * v4.0, 2021-05-15, SRT: Build SRT from source by SRS. 4.0.115
 * v4.0, 2021-05-15, Rename SrsConsumer* to SrsLiveConsumer*. 4.0.114
 * v4.0, 2021-05-15, Rename SrsRtcStream* to SrsRtcSource*. 4.0.113
@@ -1923,6 +1924,7 @@ Winlin
 [bug #2188]: https://github.com/ossrs/srs/issues/2188
 [bug #1193]: https://github.com/ossrs/srs/issues/1193
 [bug #2304]: https://github.com/ossrs/srs/issues/2304#issuecomment-826009290
+[bug #2355]: https://github.com/ossrs/srs/issues/2355
 [bug #yyyyyyyyyyyyy]: https://github.com/ossrs/srs/issues/yyyyyyyyyyyyy
 
 [bug #1631]: https://github.com/ossrs/srs/issues/1631
diff --git a/trunk/src/app/srs_app_gb28181.cpp b/trunk/src/app/srs_app_gb28181.cpp
index d99ef0544..14bb3de45 100644
--- a/trunk/src/app/srs_app_gb28181.cpp
+++ b/trunk/src/app/srs_app_gb28181.cpp
@@ -51,6 +51,7 @@ using namespace std;
 #include <srs_protocol_utility.hpp>
 #include <srs_protocol_format.hpp>
 #include <srs_app_sip.hpp>
+#include <srs_app_rtc_source.hpp>
 
 //#define W_PS_FILE
 //#define W_VIDEO_FILE
@@ -1436,10 +1437,38 @@ srs_error_t SrsGb28181RtmpMuxer::initialize(SrsServer *s, SrsRequest* r)
         return srs_error_wrap(err, "create source");
     }
 
-    //TODO: ???
-    // if (!source->can_publish(false)) {
-    //     return srs_error_new(ERROR_GB28181_SESSION_IS_EXIST, "stream %s busy", req->get_stream_url().c_str());
-    // }
+ #ifdef SRS_RTC
+    SrsRtcSource *rtc = NULL;
+    bool rtc_server_enabled = _srs_config->get_rtc_server_enabled();
+    bool rtc_enabled = _srs_config->get_rtc_enabled(req->vhost);
+    if (rtc_server_enabled && rtc_enabled) {
+        if ((err = _srs_rtc_sources->fetch_or_create(req, &rtc)) != srs_success) {
+            return srs_error_wrap(err, "create source");
+        }
+
+        if (!rtc->can_publish()) {
+            return srs_error_new(ERROR_RTC_SOURCE_BUSY, "gb28181 rtc stream %s busy", req->get_stream_url().c_str());
+        }
+    }
+#endif
+
+    // Check whether RTMP stream is busy.
+    if (!source->can_publish(false)) {
+        return srs_error_new(ERROR_SYSTEM_STREAM_BUSY, "gb28181 rtmp: stream %s is busy", req->get_stream_url().c_str());
+    }
+
+    // Bridge to RTC streaming.
+#if defined(SRS_RTC) && defined(SRS_FFMPEG_FIT)
+    if (rtc) {
+        SrsRtcFromRtmpBridger *bridger = new SrsRtcFromRtmpBridger(rtc);
+        if ((err = bridger->initialize(req)) != srs_success) {
+            srs_freep(bridger);
+            return srs_error_wrap(err, "bridger init");
+        }
+
+        source->set_bridger(bridger);
+    }
+#endif
 
     if ((err = source->on_publish()) != srs_success) {
         return srs_error_wrap(err, "on publish");
diff --git a/trunk/src/core/srs_core_version4.hpp b/trunk/src/core/srs_core_version4.hpp
index 8f301a368..31be6ba1a 100644
--- a/trunk/src/core/srs_core_version4.hpp
+++ b/trunk/src/core/srs_core_version4.hpp
@@ -26,6 +26,6 @@
 
 #define VERSION_MAJOR       4
 #define VERSION_MINOR       0
-#define VERSION_REVISION    115
+#define VERSION_REVISION    116
 
 #endif