Looks like the Great Firewall or something like it is preventing you from completely loading www.skritter.com because it is hosted on Google App Engine, which is periodically blocked. Try instead our mirror:
This might also be caused by an internet filter, such as SafeEyes. If you have such a filter installed, try adding appspot.com to the list of allowed domains.
The first volume of an introductory textbook series.
Elementary Chinese Readers 基础汉语课本 Volume 1, Revised edition. Written by Wu Buo in association with the Beijing Language Institute. Published in 1997 by Sinolingua. 250 pages. ISBN: 978-7800521348.