<!DOCTYPE html>
<html>
  <head>
    <title>Simple Map</title>
    <meta name="viewport" content="initial-scale=1.0">
    <meta charset="utf-8">
    <style>
      /* Always set the map height explicitly to define the size of the div
       * element that contains the map. */
      #map {
        height: 100%;
      }
      /* Optional: Makes the sample page fill the window. */
      html, body {
        height: 100%;
        margin: 0;
        padding: 0;
      }
    </style>
  </head>
  <body>
    <div id="map"></div>
    <script>
      function initMap() {
        var map = new google.maps.Map(document.getElementById('map'), {
          zoom: 8,
          center: {lat: -34.397, lng: 150.644}
        });
        var geocoder = new google.maps.Geocoder();
        geocodeAddress(geocoder, map);
      }

      function geocodeAddress(geocoder, resultsMap) {
        var address = "中国上海";
        geocoder.geocode({'address': address}, function(results, status) {
          if (status === 'OK') {
            resultsMap.setCenter(results[0].geometry.location);
            var marker = new google.maps.Marker({
              map: resultsMap,
              position: results[0].geometry.location
            });

          } else {
            alert('Geocode was not successful for the following reason: ' + status);
          }
        });
      }
    </script>
    <script src="https://maps.googleapis.com/maps/api/js?key=AIzaSyAKm7Pl17IWeiwwShbfK0a8NVy1Ys4nLow&callback=initMap"
    async defer></script>
  </body>
</html>