Searched for https://zh-cn.facebook.com/campaign/landing.php?placement=pflo&campaign_id=402047449186&extra_1=auto 
Note: This calendar view maps the number of captures of https://zh-cn.facebook.com/campaign/landing.php?placement=pflo&campaign_id=402047449186&extra_1=auto, not how many times the site was actually updated.
Look Up URL in general Internet Archive web collection.