Recently I started to have spikes in organic traffic coming from baidu to one particular page of my site.First of all, my site has a Chinese version and I do need visitors from China. So I don't want to block baidu completely.Ok, I started to investigate. The average session duration for 90% of these hits is 0 seconds, so my guess is that these are not real visitors.I started to gather the statistics for this page with PHP variables $_SERVER['REMOTE_ADDR'] and $_SERVER['HTTP_REFERER'] and here are the results (for the last two days):Total IP addresses count = 3876Unique IP addresses count = 3118Maximum hits from one particular IP address = 9Total http_referer = 3586Unique http_referer = 3278Maximum number of the same referral page = 5.The problem is that the referral pages seem to be valid pages. They look like this: https://www.baidu.com/link?url=uQ3Foy5eYozYEq1wDKYDUqlbF_W-umpEZAMyulIp-MqiVUqPPdFUtT5_Xumavs7gKlfnZXv15-2H69EbcOkWbnXQua97JF4R45zzMO10LJY5yHlIxC2fZa-dX6JeMtLDut3VWu08nrbzFVt0XjgI5_&wd=&eqid=faceb5600002fa4d00000002585c8f6eIt's encoded address as it would appear in baidu search results and it redirects to the page in question.Anybody has any ideas why this is happening and what can I do about it?P.S. Since a long time I have a filter in GA to block all other hostnames except my own site.UPDATE 1: Info on HTTP_USER_AGENT (for the last 24 hours):Total http_user_agent = 1804Unique http_user_agent = 607The most frequent user agents count:Mozilla/5.0 (Windows NT 5.1) AppleWebKit/537.36 (KHTML, like Gecko)  Chrome/45.0.2454.101 Safari/537.36 => 125 hitsMozilla/5.0 (compatible; Baiduspider/2.0;  +http://www.baidu.com/search/spider.html) => 108 hitsMozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like  Gecko) Chrome/45.0.2454.101 Safari/537.36 => 81 hitsMozilla/5.0 (Windows NT 5.1) AppleWebKit/537.36 (KHTML, like Gecko)  Chrome/47.0.2526.108 Safari/537.36 2345Explorer/8.2.2.14352 => 56 hitsMozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like  Gecko) Chrome/47.0.2526.108 Safari/537.36 2345Explorer/8.2.2.14352 =>  50 hits
Fake organic traffic from baidu to one particular page
google analytics;spam;traffic