User-agent: Baiduspider
Allow: /

User-agent: Googlebot
Allow: /

User-agent: Sogou web spider
Allow: /

User-agent: bingbot
Allow: /

User-agent: Bytespider
Allow: /

User-agent: YandexBot
Allow: /

User-agent: 360Spider
Allow: /

User-agent: Yahoo! Slurp
Allow: /

User-agent: *
Disallow: /