diff --git a/src/Main/options.cxx b/src/Main/options.cxx
index f63d2a8..30ef030 100644
--- a/src/Main/options.cxx
+++ b/src/Main/options.cxx
@@ -125,6 +125,13 @@ static int fgSetupProxy( const char *arg );
 void fgSetDefaults ()
 {
 
+
+    //zhongjin
+
+    fgSetBool("/sim/terrasync/global", false);
+    fgSetString("/sim/sound/ttsurl", "");
+
+
     // Position (deliberately out of range)
     fgSetDouble("/position/longitude-deg", 9999.0);
     fgSetDouble("/position/latitude-deg", 9999.0);
@@ -1787,6 +1794,8 @@ where:
 enum OptionType { OPTION_BOOL = 0, OPTION_STRING, OPTION_DOUBLE, OPTION_INT, OPTION_CHANNEL, OPTION_FUNC, OPTION_IGNORE };
 const int OPTION_MULTI = 1 << 17;
 
+//zhongjin add ttsurl ...
+
 struct OptionDesc {
     const char *option;
     bool has_param;
@@ -1797,6 +1806,11 @@ struct OptionDesc {
     int (*func)( const char * );
     } fgOptionArray[] = {
 
+    {"ttsurl",        true, OPTION_STRING, "/sim/sound/ttsurl", false, "", 0 },
+    {"hidemenu",        false, OPTION_BOOL, "/sim/menubar/visibility", false, "", nullptr },
+    {"showmenu",        false, OPTION_BOOL, "/sim/menubar/visibility", true, "", nullptr },
+    {"global",          true,  OPTION_BOOL, "/sim/terrasync/global", false, "", nullptr },
+
     {"language",                     true,  OPTION_IGNORE, "", false, "", 0 },
     {"console",                      false, OPTION_FUNC,   "", false, "", fgOptConsole },
     {"launcher",                     false, OPTION_IGNORE, "", false, "", 0 },