Both Bus Online and ShiTong HuaNa operate inner-city bus TV ad. The quote is RMB/week. CCME run intra-city and airport bus ad. The following Ad quote is RMB/month. CCME run on Beijing airport (world second largest airport by passengers with 74 Million passenger in 2010). And GuangZhou airport (China's second largest airport with 41 million passengers in 2010). http://en.wikipedia.org/wiki/World%27s_busiest_airports_by_passenger_traffic
Based on AD pricing compared to two other bus TV operator. CCME do price lower than its competitors. So CCME should be competitive to attract customers and agents. Based on following rate, and exclude embedded ad sale, CCME earn US$100 million revenue for 3.1 minutes ad sold per hour.