Six-year-old, six-year-old, eight-character, strange door, six-year-old, purple or micro-bucket, which is more harmful?

Traditionally, Qimen has the highest evaluation and is known as the study of emperors. It is considered as the highest level of prediction. In ancient times, it was mainly used in the formation of Bing, Liu Nuo, Taiyi and Qimen, also known as "three types". It is regarded as the advanced prediction of China's Three Wonders, and it is also widely used in other fields. Because it has a long history. Others are relatively late, and generally began to develop around the Song Dynasty, generally only for forecasting.