Add copirated for tencent

@@ -20,13 +20,17 @@ import LeafletMap from '../leaflet-map';
 import { UnitedMapSettings } from '../map-models';
 
 export class TencentMap extends LeafletMap {
-    constructor($container, options: UnitedMapSettings) {
-        super($container, options);
-        const txUrl = 'http://rt{s}.map.gtimg.com/realtimerender?z={z}&x={x}&y={y}&type=vector&style=0';
-        const map = L.map($container).setView(options?.defaultCenterPosition, options?.defaultZoomLevel);
-        const txLayer = L.tileLayer(txUrl, { subdomains: '0123', tms: true }).addTo(map);
-        txLayer.addTo(map);
-        super.setMap(map);
-        super.initSettings(options);
-    }
+  constructor($container, options: UnitedMapSettings) {
+    super($container, options);
+    const txUrl = 'http://rt{s}.map.gtimg.com/realtimerender?z={z}&x={x}&y={y}&type=vector&style=0';
+    const map = L.map($container).setView(options?.defaultCenterPosition, options?.defaultZoomLevel);
+    const txLayer = L.tileLayer(txUrl, {
+      subdomains: '0123',
+      tms: true,
+      attribution: '©2020 Tencent - GS(2018)2236号- Data© NavInfo'
+    }).addTo(map);
+    txLayer.addTo(map);
+    super.setMap(map);
+    super.initSettings(options);
+  }
 }