External prediction refers to taking the predicted person or thing as the taiji point, taking the "omen" and "omen" appearing in the space-time environment at the time of prediction as the prediction tool, and judging success or failure by analyzing these "omens". This kind of prediction is the application of the theory of "harmony between man and nature", and it is an advanced prediction from avenue to simplicity. This prediction originated from the English chapter of Sanyaoling in the Book of Changes of Plum Blossoms, which is the most concise summary of the ancient people's foreign response prediction and has strong practical application value.

External prediction is a kind of prediction technology originally created by China ancients. Ancient ancestors looked up at astronomy, looked down at geography, and looked far away, and summed up this super-time prediction technology. In specific applications, according to the classification and analogy of various objects in vitro, such as color, position, movement, direction, object, category, tone, smell and so on. The predicted person or thing can judge whether it is good or bad.

The earliest person who used external forecasting in contemporary China was Mr. Shao Weihua, the "Tan Yi Master". In his famous divination-predicting the life and death of the former Soviet leader Chernenko, he used the external reaction of "water overflowing on divination paper", which hit home and became an instant hit.

After that, the outside world should predict that the master will double out. Deng Haiyi and Jian Huang are experts in this field, and Ma Wancheng and Han Haijun, students from Jian Huang, are among the best. It is particularly worth mentioning that Mr. Ma Wancheng, a native of Datong, Shanxi Province, has a unique understanding of external forecasting and applies it like a god. His external reaction theory has a great influence.

In Beijing, inspired by Ma Wancheng's theory, Mr. Li Lei founded the theory of stock market futures forecast by external factors-the theory of stock market futures forecast by external factors of yin and yang, which is simple and accurate. Its theoretical basis is "harmony between man and nature" and "Yin-Yang Taiji". The method is to take people, things and moving images around us as external reactions, and determine the yin and yang attributes of external reactions, so as to predict the rise (yang) or fall (yin) of stock market or futures varieties. In his blog "Yin and Yang External Response", Mr. Lei elaborated in detail the theory and examples of external response forecasting stock market futures.