selected 不要注释，否则后面判空会出错

@@ -481,7 +481,7 @@ Page({
       label: '就读国家(地区)',
       bindtype: 'school_country',
       isrequre: true,
-      // selected: '中国',
+      selected: '',
       // isblack: 'true',
       values: [],
       placeholder: '请选择就读国家(地区)',
@@ -492,7 +492,7 @@ Page({
       bindtype: 'country',
       isrequre: true,
       // disabled: true,
-      selected: '中国',
+      selected: '',
       // range_key:'name',
       placeholder: '请选择国籍',
       onChange: 'onPickerSelect',
@@ -501,7 +501,7 @@ Page({
       label: '国籍',
       bindtype: 'lover_country',
       // isrequre: true,
-      selected: '中国',
+      selected: '',
       placeholder: '请选择国籍',
       onChange: 'onPickerSelect',
     },
@@ -509,7 +509,7 @@ Page({
       label: '被赡养人国籍',
       bindtype: 'older_country',
       isrequre: true,
-      selected: '中国',
+      selected: '',
       placeholder: '请选择国籍',
       onChange: 'onPickerSelect',
     },