1. Reading method is to obtain information from relevant documents, newspapers, magazines, books and materials.
2. The purchase method is to purchase relevant materials from educational science centers, consulting institutions, educational research institutions and related universities.
The way to listen is to get relevant information from the radio, telephone, etc.
4. Query method is to query relevant information sources to obtain relevant information.
5. Prediction method is to analyze and predict relevant information with prediction methods and techniques.
6. The collection method is to send personnel to relevant regions and departments to collect information.