How to use the compass? What books do you read?

Buy a book like Understanding Compass. To learn Feng Shui, you must have a good and accurate Feng Shui compass. (Taipei) has been producing and selling compasses for more than 20 years. There are more than 30 kinds of compasses, such as three-way disc, three-way disc, comprehensive disc, mysterious flying star disc and golden lock jade plate. Baidu search ~ jiyitang.