The Great Firewall recently blocked time period targeted queries from both the google.com and google.com.hk sites. So from China I can search for, say, "pets",

The Great Firewall recently blocked time period targeted queries from both the google.com and google.com.hk sites. So from China I can search for, say, "pets", but if I want to restrict it the search to last month only, it blocks out. Baidu doesn't seem to offer the time period targeting facility. I guess it's a case of if you can't implement it yourself, remove it from the competitor's service.