diff --git a/worldmap/worldmap.js b/worldmap/worldmap.js
index be5d2a7..40cd201 100644
--- a/worldmap/worldmap.js
+++ b/worldmap/worldmap.js
@@ -815,7 +815,7 @@ map.on('locationfound', onLocationFound);
 map.on('locationerror', onLocationError);
 
 // single right click to add a marker
-var addmenu = "<b>Add marker</b><br><input type='text' id='rinput' autofocus onkeydown='if (event.keyCode == 13) addThing();' placeholder='name (,icon/SIDC, layer, colour, heading)'/>";
+var addmenu = "<b>添加标记</b><br><input type='text' id='rinput' autofocus onkeydown='if (event.keyCode == 13) addThing();' placeholder='name (,icon/SIDC, layer, colour, heading)'/>";
 if (navigator.onLine) { addmenu += '<br/><a href="https://www.spatialillusions.com/unitgenerator-legacy/" target="_new">MilSymbol SIDC generator</a>'; }
 var rightmenuMap = L.popup({keepInView:true, minWidth:260}).setContent(addmenu);