Found this bot accessing the site via lots of different 202.46.* IPs. Reverse DNS points to ptr.cnsat.com.cn.
The range of IPs for 202.46.32.0 to 202.46.63.255 is associated with ShenZhen Sunrise Technology Co., Ltd.
This is how to ban via .htaccess RewriteRule:
## ban ptr.cnsat.com.cn
RewriteCond %{REMOTE_ADDR} ^202\.46\.(3[2-9]|[4-5][0-9]|6[0-3])\.
RewriteRule !^robots\.txt - [F]
Optionally, you can add this RewriteCond for the useragent they happen to be using at the moment:
RewriteCond %{HTTP_USER_AGENT} ^Mozilla/5\.0\ \(Windows\ NT\ 5\.1;\ rv:6\.0\.2\)\ Gecko/20100101\ Firefox/6\.0\.2
However, the IP ban is specific to the range owned by the company, so personally I wouldn’t bother using that useragent criteria. They could just change it at any time.
I did see they made several requests to robots.txt, but without a proper user agent identifying this bot as a crawler, your guess is as good as mine how to ban it in robots.txt, perhaps:
User-Agent: ptr.cnsat.com.cn Disallow: /
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