12304 is a special service number provided by the telecom operator's network platform. At present, this special service number is the telephone number of the People's Daily's unified subscription to mobile newspaper reading service throughout the country, not the telephone number of any department.
You can subscribe to the People's Daily mobile newspaper reading service by actively dialing this number, but the service is currently under construction. If you want to know the People's Daily, you can directly search the People's Daily to read the newspaper. If the number is dialed on its own initiative, it is a promotion number and there may be fraud risk. Please answer carefully.
The United States Congress confirmed Antonio Muzzi as the inventor of the telephone in resolution 269 of June, 2002 15. Muzi first showed his invention to the public in 1860, and published an introduction about this invention in an Italian newspaper in new york.
The improvements and inventions of telephone in history include: toner microphone, manual switchboard, dial, automatic telephone exchange, program-controlled telephone exchange, dual-tone multi-frequency dialing, voice digital sampling and so on. The new technologies in recent years include ISDN, DSL, VoIP, analog mobile phone and digital mobile phone.