Beijing, 1991; digital copy of slide. Complete indexed photo collection at WorldHistoryPics.com.
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/101561334@N08">Gary Todd</a> from Xinzheng, China
1991-06-30 06:42
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/101561334@N08/10553693795/">Beijing Map of Underground City</a>