1. Source of data collection: it is necessary to clarify the source of data, truthfully investigate, collect online, and retrieve information from the library.
2. Time and place of data collection: It is necessary to record the time and place of data collection for subsequent data analysis and statistics.
3. Type and form of data: you need to specify the type and form of collected data, such as quantity data, ratio data, classified data, etc.
4. Data security measures: We need to consider how to protect the privacy and security of data, such as password protection and restricting the access rights of data.