It could be even harder for average consumers to recognize reliable links on Baidu where paid ads are mixed with organic search results. In 2012 there emerged seven big goods suppliers who had plenty of products that belong to the Five Black Categories. Some hackers took an easier way: stealing the orders from those single page sites or even goods suppliers. In 2013 they established a union agreeing to offer low prices for those high-cost keywords of the Five Black Categories. But the mobile Internet is another world that the single page sites cannot work.