title: How to always get a zipcode record from ggmap/googleway package in R?
body: <p>Two questions related to this topic. First, with the sample address '方桥社区居委会', I first checked it directly from Google Map, and I get both its location and its English translation 'Fangqiao Community Residents' Committee'.
  However, when I try to run the code</p>
  
  <pre><code>library(googleway)
  key &lt;- 'APIkey'
  google_geocode(address = "方桥社区居委会", language = "CN", key = key)
  </code></pre>
  
  <p>The result I got from above Chinese address is</p>
  
  <pre><code>$results
  
  address_components
  1 Xinhai Avenue, Yaohai Qu, Hefei Shi, Anhui Sheng, China, Xinhai Ave, Yaohai 
  Qu, Hefei Shi, Anhui Sheng, CN, route, political, sublocality, 
  sublocality_level_1, locality, political, administrative_area_level_1, 
  political, country, political
                                   formatted_address geometry.location.lat
  1 Xinhai Ave, Yaohai Qu, Hefei Shi, Anhui Sheng, China              31.89561
    geometry.location.lng geometry.location_type 
  geometry.viewport.northeast.lat
  1              117.3393            APPROXIMATE                        
  31.89696
    geometry.viewport.northeast.lng geometry.viewport.southwest.lat
  1                        117.3407                        31.89426
    geometry.viewport.southwest.lng                    place_id
  1                         117.338 ChIJ2attw2plyzUR782Meh0Xnvs
                           types
  1 establishment, point_of_interest
  
  $status
  [1] "OK"
  </code></pre>
  
  <p>I can not get its postal_code information. When I use the following codes</p>
  
  <pre><code>google_geocode(address = "Fangqiao Community Residents' Committee", language = "CN", key = key)
  </code></pre>
  
  <p>I can get its postal_code information. </p>
  
  <pre><code>$results
  
  address_components
  1 Jiangdu Road, Guangling Qu, Yangzhou Shi, Jiangsu Sheng, China, 225009, 
  Jiangdu Rd, Guangling Qu, Yangzhou Shi, Jiangsu Sheng, CN, 225009, route, 
  political, sublocality, sublocality_level_1, locality, political, 
  administrative_area_level_1, political, country, political, postal_code
                                                   formatted_address
  1 Jiangdu Rd, Guangling Qu, Yangzhou Shi, Jiangsu Sheng, China, 225009
    geometry.location.lat geometry.location.lng geometry.location_type
  1              32.39118              119.4622            APPROXIMATE
    geometry.viewport.northeast.lat geometry.viewport.northeast.lng
  1                        32.39253                        119.4635
    geometry.viewport.southwest.lat geometry.viewport.southwest.lng 
  partial_match
  1                        32.38983                        119.4608          
  TRUE
                   place_id                            types
  1 ChIJcQhNY82HtjURw8QwBzgCGgA establishment, point_of_interest
  
  $status
  [1] "OK"
  </code></pre>
  
  <p>Why is there a difference?
  May I know how this package works or how Google Map works, and in which way I can get the zip code of a location of China for sure?</p>