diff --git a/README.md b/README.md
index 075dba5..602cff7 100644
--- a/README.md
+++ b/README.md
@@ -113,11 +113,12 @@ map = Map(init_opts=opts.InitOpts(width='1200px', height='800px'))
 map.set_global_opts(
     title_opts=opts.TitleOpts(title="个人足迹地图"),
     visualmap_opts=opts.VisualMapOpts(max_=1, is_piecewise=True,
-                                      pieces=[
-                                        {"max": 1, "min": 1, "label": "去过", "color": "#4EA397"},
-                                        {"max": 0, "min": 0, "label": "未去过", "color": "#FFFFFF"},
-                                        ])  #最大数据范围，分段
-                                     )
+                pieces=[
+                         {"max": 1, "min": 1, "label": "去过", "color": "#4EA397"},
+                         {"max": 0, "min": 0, "label": "未去过", "color": "#FFFFFF"},
+                        ])  #最大数据范围，分段
+    )
+
 map.add("个人足迹地图", data_pair=province_dict.items(), maptype="china", is_roam=True)
 map.render('全国.html')
 
@@ -126,7 +127,11 @@ map.render('全国.html')
 运行上述脚本，会生成`全国.html`。为了保证图片居中显示，我们对该HTML中的下面一行：
 
 ```html
-<div id="a438407081634ceab6af1c965034ae16" class="chart-container" style="width:1200px; height:800px;"></div>
+<div 
+     id="a438407081634ceab6af1c965034ae16" 
+     class="chart-container" 
+     style="width:1200px; height:800px;">
+</div>
 ```
 
 的样式（style）增加如下内容：
@@ -162,11 +167,12 @@ for province, cities in province_city_dict.items():
     map.set_global_opts(
         title_opts=opts.TitleOpts(title="个人足迹地图-%s" % province),
         visualmap_opts=opts.VisualMapOpts(max_=1, is_piecewise=True,
-                                          pieces=[
-                                            {"max": 1, "min": 1, "label": "去过", "color": "#4EA397"},
-                                            {"max": 0, "min": 0, "label": "未去过", "color": "#FFFFFF"},
-                                            ])  #最大数据范围，分段
-                                         )
+                     pieces=[
+                            {"max": 1, "min": 1, "label": "去过", "color": "#4EA397"},
+                            {"max": 0, "min": 0, "label": "未去过", "color": "#FFFFFF"},
+                           ])  #最大数据范围，分段
+            )
+    
     city_dict = dict(zip(cities, [1]*len(cities)))
     map.add("个人足迹地图-%s" % province, data_pair=city_dict.items(), maptype=province, is_roam=True)
     map.render('./provinces/%s.html' % province)