YisouSpider is a bot in the search engine crawlers category, operated by Alibaba.
YisouSpider is the crawler of Shenma, the mobile search engine run by Alibaba and UCWeb in China.
Search engine crawlers index your pages so they can appear in search results. Keep the genuine ones allowed and verify them, because fake search crawlers are one of the most common disguises for scrapers.
Sample user agent strings sent by YisouSpider:
YisouSpiderMozilla/5.0 (iPhone; CPU iPhone OS 16_3 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/16.2 Mobile/15E148 YisouSpider/5.0 Safari/604.1Mozilla/5.0 (iPhone; CPU iPhone OS 10_3 like Mac OS X) AppleWebKit/602.1.50 (KHTML, like Gecko) CriOS/56.0.2924.75 Mobile/14E5239e YisouSpider/5.0 Safari/602.1Anyone can copy a user agent string. Transfon Security also checks where each request comes from, so a request that claims to be a known crawler but comes from the wrong network is treated as a fake, not as the real crawler.
Share of YisouSpider requests to sites protected by Transfon Security in the 7 days to 27 October 2026.
| China | 100% |
| Chinanet AS4134 | 75% |
| CHINA UNICOM China169 Backbone AS4837 | 25% |
We have not confirmed whether YisouSpider follows robots.txt. Add a rule, then check your logs to see that it stopped. robots.txt is a plain text file at the root of your domain, such as https://example.com/robots.txt.
User-agent: YisouSpider Disallow: /
User-agent: YisouSpider Disallow: /private/ Disallow: /search
User-agent: YisouSpider Allow: /blog/ Disallow: /
User-agent: YisouSpider Allow: / User-agent: * Disallow: /
User-agent: YisouSpider group, YisouSpider ignores your User-agent: * rules, so repeat any that should still apply.YisouSpider from YisouSpider's user agent; check Alibaba's own documentation if it publishes a different robots.txt name.Treat robots.txt as a statement of your policy, and enforce it where requests arrive.
YisouSpider brings search traffic, so keep the real one allowed. Fake YisouSpider requests are a common cover for scrapers, so verify it by network rather than by name.
Transfon Security for publishersSearch crawlers fetch landing pages to check them. Keep YisouSpider allowed, but out of campaign and conversion data.
Transfon Security for advertisersYisouSpider indexes products for search results. Allow it, and block impersonators that use its name to scrape prices.
Transfon Security for e-commerceAllow YisouSpider on marketing and docs pages, and keep it off signed-in app pages it cannot use.
Transfon Security for SaaS and APIsrobots.txt is a request, not an enforcement. Transfon Security shows YisouSpider by name in the Top Bots report, so you can see how often it visits and which pages it reads. Block or allow it with a User Agent rule, or slow it down with a rate limit decision rule.
Transfon Security
YisouSpider is a bot in the search engine crawlers category, operated by Alibaba. YisouSpider is the crawler of Shenma, the mobile search engine run by Alibaba and UCWeb in China.
We have not confirmed whether YisouSpider follows robots.txt. Add a robots.txt rule, then check your logs to see that it stopped, and block it by user agent if it did not.
Add "User-agent: YisouSpider" followed by "Disallow: /" to the robots.txt file at the root of your site. To enforce it, block requests whose user agent contains "YisouSpider" at your WAF. In Transfon Security that is one User Agent block rule.
No. robots.txt is voluntary, so YisouSpider may not follow it, and anyone can send YisouSpider's user agent, so a fake YisouSpider ignores your rule. Enforce the rule where requests arrive, at your WAF, and check the source network.
Search engine crawlers index your pages so they can appear in search results. Keep the genuine ones allowed and verify them, because fake search crawlers are one of the most common disguises for scrapers.
Transfon Security identifies every bot in this directory in your traffic reports, flags fake search crawlers, and lets you allow, block or rate limit each bot.
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