1, the content quality problem, some critics pointed out that there are a lot of nonsense in the series of teaching materials of horse engineering, but it makes people feel that they have said nothing. Some readers have reported that there are obvious typos in the textbook "Rural Sociology" of Ma Engineering, and the conclusions are inconsistent. The biggest problem is too much nonsense.
2. Typesetting and design issues. The layout and design of the series of teaching materials for horse engineering are very bad. A textbook will have a full page of written proof, which makes people dizzy.