The common people's lecturer means that grass-roots units select ordinary people to publicize the principles and policies of the party and the government in a form that they like to hear and see.
The statement 'Entrusted by the street office, Mr. Jiang, a citizen, compiled the new medical insurance policy into Allegro, recorded it as a video, and posted it on the official Wechat account and moments every day' belongs to the common people's lecturer.