These books in the picture are illustrated with pictures and texts, which are not too boring to read, psychologically easy to accept and relatively quick to get started (I have also bought them). There are many kinds of small household appliances on the market now, but maintenance is a difficult problem. There are few accessories and the maintenance price is not high, but the technology is still good. I wish you a warm and positive heart and get good technology! (Because I was poor at first, I came from studying and practicing, so I sincerely wish)