"On the one hand, microblogs can reflect the social situation and public opinion, and broadcast a positive public voice, " Mr Wang was quoted as saying by Reuters news agency.
The voice-activated videoconferencing cameras picked up users' images and broadcast them over the intranet, enabling all viewers to see and hear who was asking the question.
In the days when what is now called terrestrial radio -- that is, free radio, broadcast by local stations -- ruled, you couldn't help hearing his voice as you twisted the dial through the stations in your town.