CSM Media Research operates the world's largest TV & radio audience measurement panel network, covering more than 59.1 thousands households. CSM's TV audience measurement network provides data that represents the viewing of 1.28 billion people in China mainland and 6.40 million people in Hong Kong SAR. The radio network represents the listening of 1.43 billion people in China.
Up to June, 2017, CSM delivers data from 148 TAM panels (1 national panel, 25 provincial panels, and 122 city panels including Hong Kong SAR) which provide data independently, measuring the viewing of 985 unique TV channels all day, every day of the year. Meanwhile, CSM has built radio audience measurement panels in 34 cities and 3 provinces, measures the listening of 431 radio frequencies.