All Channels are using callsigns with a prefix of "Shanghai People's Radio Station"(Chinese: 上海人民广播电台), but most programmes of them has been produced by of SMG Radio Centre (Chinese: 东方广播中心) (a.k.a.
The text describes a situation where all channels use a specific callsign prefix, "Shanghai People's Radio Station," but the actual production of their programs is handled by another entity, SMG Radio Centre.