You should choose the right book based on your interests.
First of all, buy a history of Western music, a foreign music dictionary or the more expensive Concise Oxford Music Dictionary.
Why? Because the track you are searching for cannot be found? Because you can’t search in Chinese, it’s best to use the original text. Baidu’s mp3 can search for most songs, really, but you have to use the right keywords. Sometimes the composer is not from an English-speaking country. This is very common. There are many Italian, French, and German composers, so buying a music history and dictionary will ensure that you know what the repertoire is. The Chinese translation version may not be uniform.
You can buy "50 Lectures on Music Appreciation", which is a good introduction. The history of music is both rich and weak. There are very few primary sources from China, and some of the content may be inaccurate. There are also many errors in foreign translations. There is a truly authoritative history of music in a row, and there is no Chinese version. Such as Oxford and New Grove. So try to choose books from big publishing houses, preferably books written by teachers from universities in Beijing and Shanghai. I recommend the Cambridge Illustrated History of Music. This book has been a slow seller all year round. There should be a special price on the Internet. Why buy this book? It is thick, has color pictures and musical scores, and makes people feel real. If you like anecdotes about musicians, you can buy the Sanlian "Music Anecdotes" and the life of a great musician, which are biographies of musicians. With these, you can know most of the common sense.
Many original classical music recordings on Taobao are cheaper than imported ones on Joyo, and they are not pirated. There are many resources to download from eMule on the Internet. Although I don’t use eMule, I can still search a lot from abroad. Of course, you don’t need Baidu to search for foreign network hard disk resources. Use other search methods, the most commonly used engine by foreigners. Of course, the keywords cannot be in Chinese. It is better to use Baidu for Chinese keywords.
If you are interested, you can go to some classical music forums. Since I have been in elementary school, I never go to those forums, but there are many good things in many forums. Dive slowly and you will find out.