diff --git a/src/slic3r/GUI/DeviceManager.cpp b/src/slic3r/GUI/DeviceManager.cpp
index 82c0f9c4c8..10a931684a 100644
--- a/src/slic3r/GUI/DeviceManager.cpp
+++ b/src/slic3r/GUI/DeviceManager.cpp
@@ -798,19 +798,19 @@ void MachineObject::_parse_tray_now(std::string tray_now)
         try {
             int tray_now_int = atoi(tray_now.c_str());
 
-            if (tray_now_int == 255) {
+            if (tray_now_int == VIRTUAL_TRAY_MAIN_ID) {
                 m_ams_id = "0";
                 m_tray_id = "0";
                 m_extder_data.extders[MAIN_NOZZLE_ID].snow.ams_id  = "";
                 m_extder_data.extders[MAIN_NOZZLE_ID].snow.slot_id = "";
 
-                if (m_tray_now == std::to_string(255)) {
-                    m_extder_data.extders[MAIN_NOZZLE_ID].snow.ams_id  = std::to_string(255);
+                if (m_tray_now == std::to_string(VIRTUAL_TRAY_DEPUTY_ID)) {
+                    m_extder_data.extders[MAIN_NOZZLE_ID].snow.ams_id  = std::to_string(VIRTUAL_TRAY_MAIN_ID);
                     m_extder_data.extders[MAIN_NOZZLE_ID].snow.slot_id = "0";
                 }
             }
-            else if (tray_now_int == 254) {
-                m_extder_data.extders[MAIN_NOZZLE_ID].snow.ams_id  = std::to_string(254);
+            else if (tray_now_int == VIRTUAL_TRAY_DEPUTY_ID) {
+                m_extder_data.extders[MAIN_NOZZLE_ID].snow.ams_id  = std::to_string(VIRTUAL_TRAY_MAIN_ID);
                 m_extder_data.extders[MAIN_NOZZLE_ID].snow.slot_id = "0";
             }
             else {
@@ -3669,7 +3669,7 @@ int MachineObject::parse_json(std::string payload, bool key_field_only)
                         }
 
                         /*the param is invalid in np for Yeshu*/
-                        if (!check_enable_np(jj) && jj.contains("hw_switch_state")) {
+                        if (jj.contains("hw_switch_state")) {
                             hw_switch_state = jj["hw_switch_state"].get<int>();
                             m_extder_data.extders[MAIN_NOZZLE_ID].ext_has_filament = hw_switch_state;
                         }
diff --git a/src/slic3r/GUI/Widgets/AMSControl.cpp b/src/slic3r/GUI/Widgets/AMSControl.cpp
index b1c11dc927..e29939569a 100644
--- a/src/slic3r/GUI/Widgets/AMSControl.cpp
+++ b/src/slic3r/GUI/Widgets/AMSControl.cpp
@@ -1130,6 +1130,7 @@ AMSRoadShowMode AMSControl::findFirstMode(AMSPanelPos pos) {
             }
         }
         if (item->second->get_ams_model() == AMSModel::EXT_AMS && item->second->get_ext_type() == AMSModelOriginType::LITE_EXT) return AMSRoadShowMode::AMS_ROAD_MODE_AMS_LITE;
+        if (item->second->get_ams_model() == AMSModel::N3S_AMS) return AMSRoadShowMode::AMS_ROAD_MODE_SINGLE_N3S;
         return AMSRoadShowMode::AMS_ROAD_MODE_SINGLE;
     }
 }
@@ -1400,6 +1401,10 @@ void AMSControl::SwitchAms(std::string ams_id)
                     }
                     else {
                         AMSRoadShowMode mode = AMSRoadShowMode::AMS_ROAD_MODE_SINGLE;
+
+                        if (item->get_ams_model() == AMSModel::N3S_AMS)
+                            mode = AMSRoadShowMode::AMS_ROAD_MODE_SINGLE_N3S;
+
                         for (auto it : pair_id) {
                             if (it.first == ams_id || it.second == ams_id) {
                                 mode = AMSRoadShowMode::AMS_ROAD_MODE_DOUBLE;
@@ -1521,9 +1526,10 @@ void AMSControl::SetAmsStep(std::string ams_id, std::string canid, AMSPassRoadTy
     }
 
     //Set path length in different case
-    if (ams->get_can_count() == GENERIC_AMS_SLOT_NUM){
+    model  = ams->get_ams_model();
+
+    if (ams->get_can_count() == GENERIC_AMS_SLOT_NUM) {
         length = left ? 129 : 145;
-        model = ams->get_ams_model();
     } else if (ams->get_can_count() == 1) {
         for (auto it : pair_id){
             if (it.first == ams_id){
@@ -1537,8 +1543,12 @@ void AMSControl::SetAmsStep(std::string ams_id, std::string canid, AMSPassRoadTy
                 break;
             }
         }
-        model = ams->get_ams_model();
+
+        if (!in_pair && model == N3S_AMS) {
+            length = left ? 129 : 232;
+        }
     }
+
     if (model == AMSModel::AMS_LITE){
         length = left ? 145 : 45;
     }
diff --git a/src/slic3r/GUI/Widgets/AMSItem.cpp b/src/slic3r/GUI/Widgets/AMSItem.cpp
index 51b42e3ab2..70a6881b6a 100644
--- a/src/slic3r/GUI/Widgets/AMSItem.cpp
+++ b/src/slic3r/GUI/Widgets/AMSItem.cpp
@@ -2328,6 +2328,10 @@ void AMSRoadDownPart::doRender(wxDC& dc)
             dc.DrawLine(left_nozzle_pos.x - FromDIP(218), 0, left_nozzle_pos.x - FromDIP(218), (size.y / 2));
             break;
         case AMSRoadShowMode::AMS_ROAD_MODE_SINGLE:
+            dc.DrawLine(left_nozzle_pos.x - FromDIP(192), (size.y / 2), left_nozzle_pos.x, (size.y / 2));
+            dc.DrawLine(left_nozzle_pos.x - FromDIP(192), 0, left_nozzle_pos.x - FromDIP(192), (size.y / 2));
+            break;
+        case AMSRoadShowMode::AMS_ROAD_MODE_SINGLE_N3S:
             dc.DrawLine(left_nozzle_pos.x - FromDIP((129)), (size.y / 2), left_nozzle_pos.x, (size.y / 2));
             dc.DrawLine(left_nozzle_pos.x - FromDIP((129)), 0, left_nozzle_pos.x - FromDIP((129)), (size.y / 2));
             break;
@@ -2353,6 +2357,10 @@ void AMSRoadDownPart::doRender(wxDC& dc)
             dc.DrawLine(right_nozzle_pos.x, (size.y / 2), right_nozzle_pos.x + FromDIP(68), (size.y / 2));
             dc.DrawLine(right_nozzle_pos.x + FromDIP(68), 0, right_nozzle_pos.x + FromDIP(68), (size.y / 2));
             break;
+        case AMSRoadShowMode::AMS_ROAD_MODE_SINGLE_N3S:
+            dc.DrawLine(left_nozzle_pos.x - FromDIP((129)), (size.y / 2), left_nozzle_pos.x, (size.y / 2));
+            dc.DrawLine(left_nozzle_pos.x - FromDIP((129)), 0, left_nozzle_pos.x - FromDIP((129)), (size.y / 2));
+            break;
         case AMSRoadShowMode::AMS_ROAD_MODE_AMS_LITE:
             dc.DrawLine(left_nozzle_pos.x, (size.y / 2), left_nozzle_pos.x + FromDIP(145), (size.y / 2));
             dc.DrawLine(left_nozzle_pos.x + FromDIP(145), 0, left_nozzle_pos.x + FromDIP(145), (size.y / 2));
diff --git a/src/slic3r/GUI/Widgets/AMSItem.hpp b/src/slic3r/GUI/Widgets/AMSItem.hpp
index 233e9b4768..0383a6e862 100644
--- a/src/slic3r/GUI/Widgets/AMSItem.hpp
+++ b/src/slic3r/GUI/Widgets/AMSItem.hpp
@@ -72,6 +72,7 @@ enum class AMSRoadShowMode : int {
     AMS_ROAD_MODE_FOUR,
     AMS_ROAD_MODE_DOUBLE,
     AMS_ROAD_MODE_SINGLE,
+    AMS_ROAD_MODE_SINGLE_N3S,
     AMS_ROAD_MODE_AMS_LITE,
     AMS_ROAD_MODE_NONE
 };