1, complaints from the masses: 3 15 the party usually collects complaints and reports from the masses through media, internet and other channels, which will involve various industries and fields and provide rich materials for the party.

2, reporter undercover: In order to get more in-depth and more real material, 3 15 party will sometimes send reporters to conduct undercover investigation. The conference will go deep into the front line of enterprises and markets and collect first-hand information through personal experience and observation.

3. Insider broke the news: Some insiders or insiders will provide valuable information and clues to the 3 15 party, which will provide important materials for the party.

4. Public information: Some public information and data will also be the source of materials for the 3 15 party, such as the investigation report of government departments and the data of industry associations.