It's good to follow along. There is no detailed explanation, but if you have some understanding of Spring, it is not necessary to have a detailed explanation. When you first use Spring Batch in practice, it would be helpful to watch this lecture once and refer to the document for more detailed information. The unfortunate thing is that since the version that Spring Initializer does not support is currently being used, it needs to be adjusted to the past version. It would be helpful if you could also provide a guide for this part. Thank you for the great lecture.