As a traditional form of journalism, in-depth reporting refers to the fact that journalists take social development issues as the main content, use scientific methods of analysis and interpretation to report, safeguard public interests, and guide public opinion. No matter how the in-depth reporting is defined, social and Two key points of depth. According to the above definitions, Which of the following are in-depth reports:. ['A reporter conducted a systematic investigation of the haze weather and published a half-hourly news report in the media.', "In the evening news of a TV station, report on a certain minister's inspection in a certain place.", 'A number of newspapers and websites track the aftermath of the Malaysia Airlines MH370 crash.', 'A newspaper published a report on a city explaining why it is worth investing in.']