On this issue, we can find several relevant institutions to conduct field visits according to our own schedule, but it is the key to find as many as possible for comparison. So when looking for it, we must pay attention to the following points:

1. Make use of spare time to conduct field trips, and have a corresponding understanding of the corresponding courses during the field trips;

2. On-the-spot investigation, in addition to understanding the courses, we should also understand the teaching level of the teachers.

The book "That's how linux should learn" is rich in content.