Many people believe that: high psychological quality, adaptability is strong. This is a misconception! The quality of adaptive capacity is the fourth part of the individual’s constitution and is closely related to the “quality of morphological structure”, “quality of physiological functions” and “quality of mental activity”, but it is a relatively independent It is an objective fact that exists relatively independently. For example, during the Yushu earthquake, some young men who lived in Guangzhou for a long time suddenly flew to Yushu to participate in the earthquake relief work, and soon collapsed because they could not adapt to the plateau climate in a short time. However, for the frequent travel between Guangzhou and Lhasa businessmen, may be some “old people”, it is completely different. This is a typical “adaptability quality” difference. Besides, many domestic university students, masters, PhD, during school, in all aspects, are very good, but, once they join the workforce, into society, they can not adapt, and even, born a lot of “strange diseases”, all day to run to the hospital. This, perhaps, is the difference between Chinese and American university education. In the United States, students are encouraged to “go to work”, which is itself a higher education “adapt to society” course. Learning knowledge, is to better apply knowledge. Look at the European and American people, when the winter months, often push the baby stroller, so that the baby dressed in thin in the street; hot summer heat, and often lying on the beach sunbathing. This is typical of the natural environment “adaptability” training. We Cantonese, we pay attention to food, good “tonic”. It is understandable for the elderly to eat some tonic, but to give a fart to the children also “tonic”, is not allowed. The core meaning of “survival of the fittest” is to improve the quality of our “adaptability”. As long as the continuous “to adapt” to their own “unfavorable” environment, natural environment, human environment, social environment …… to have a “stronger The “stronger” physique. Some people who come to me to adjust their physique say, “My hands and feet are cold all year round in winter, is it Yang deficiency?” I put out my hand and let them feel it. As a result, they are surprised: “Your hand, it is colder than mine!” There is no need to interpret the answer. Yes, I was born prematurely, only 3.5 pounds, and it was my loving grandmother who took care of me. Since I was a child, my grandmother dressed me in a lot of clothes and never underwent “cold adaptation training”, which naturally made me “afraid of cold limbs in winter” physique. Now, at this age, there is not much room for physical fitness to rise, it is time to start “keeping”, of course, you can not “compare” with others, let alone with Europeans and Americans. However, as children and adolescents, they should increase their “adaptability training” to enhance their “cold and heat resistance” physique. This will not only improve their “quality of adaptability”, but also, through similar adaptability training, improve their “quality of mental activity”, “quality of physiological function” and “morphological structure quality”. This is the difference between human beings and computers and cars. Because people are living bodies with the ability to “self-heal, self-improvement, self-development”. Survival conditions, and “physical development”, should be an “inverse proportion” relationship. If, children, young people, young adults, sighing in the summer air conditioning, winter heating oven, physical fitness is certainly not strong there. “The survival of the fittest”, in the case of ensuring safety, through the “continuous, progressive, incremental” way, and constantly increase all aspects of “adaptive training”, children, young people, young adults Young adults, young adults, physical fitness, will certainly be increasingly strong. On the contrary, the elderly, middle-aged and elderly, we should pay special attention, because, over the decades, the physique has been basically “fixed”, can improve the space is very limited, has entered the “physique care” period. The understanding of “survival of the fittest” should be interpreted as: try to create conditions to find a “more suitable” environment for their own physique, so that their “survival” of better quality it.