The sign includes pictures and text.
However, even so, not many people can understand it, so a narrator is needed.
The narrators are all students who have participated in experimental studies, at a minimum, they must understand the knowledge they are explaining. Because the audience for the explanation includes not only the reporters but also many personnel from other laboratories who have 'arrived uninvited' after receiving the news—essentially their peers.
The reporters don't understand much and usually ask layman's questions. For example, Hu Yidao just heard a reporter asking whether Boss Yan's cattle ranch would use cloning technology in the future to cultivate better beef, expressing concern over eating cloned beef in the future.
Laymen often have more imaginative ideas, which is quite normal.
