2. Collect the list of documents required for the inspection of the selected factory.
3. Check the list of documents one by one to see if you know what they all look like, and first understand what the factory tests.
4. According to the list of documents, collect/learn relevant laws and regulations and guest requirements.
5. After the above steps are completed, find someone to communicate or find someone to train.
6. Last but not least. After several practical operations, you will graduate slowly.