Fensi Tong (粉丝通): The most well known paid advertising option on Weibo; allows more specific targeting options, including interests, gender, location and devices. Advertisers can choose between CPM (cost per mille; 0.5CNY per thousand exposure) and CPC (cost per engagement; 0.5CNY per effective engagement). Companies or organizations often use Fensitong and pay well-known Sina Weibo users (usually those with more than 1 million followers) to advertise to their followers.[66]