1. The formation of the longevity phenomenon in Rugao did not happen overnight. It has a historical development process.

The earliest record of longevity stars in Rugao can be traced back to the Three Kingdoms period, more than 1,750 years ago.

Today's centenarians were born around the beginning of the last century and have experienced more than a hundred years of vicissitudes. When analyzing the secrets of their longevity, we must place them in the course of a century of history.

Therefore, the perspective of historical materialism must be used to interpret the longevity phenomenon in Rugao, taking into account both realistic and historical factors.

2. Rugao is located in the Jianghai Plain area. The natural geographical environment and social and economic activities do not have closed conditions. Therefore, the reason for the longevity phenomenon in Rugao cannot be explained by a single factor. It is obviously the result of the superposition of multiple factors. There are

Natural, humanistic, and even the reasons for the longevity of the elderly.

After more than two years of research, they also initially believe that the factors affecting longevity in Rugao include the following: (1) Natural environmental factors: 1. The temperature is mild, comfortable and pleasant.

Rugao is located at 32°00′-32°30′ north latitude and belongs to the humid northern subtropical climate zone. The annual average temperature is 14.7°C. The average temperature in the hottest month of July is 27.1°C. The lowest temperature in the past 40 years has been below minus 10°C.

There are only 7 days with temperatures above 35℃, and there are only 5.4 days per year with temperatures above 35℃. It can be seen that the temperature in Rugao is mild, which is conducive to the normal development of human physiological functions.

2. There is abundant rain and moderate humidity.

The annual precipitation in Rugao is about 1056.8 mm, the average number of precipitation days is 119.4 days, and the number of rainstorm days greater than 50 mm is only 3.2 days. The annual average relative humidity is 80%, which is comfortable and pleasant. People feel cheerful and energetic.

3. The air is fresh and the garden is full of green.

Due to Rugao's superior climatic conditions, the territory has lush forests and green vegetation all year round. There are now 1,500-year-old ginkgo trees, 850-year-old cypress trees, more than 800-year-old pine trees, 300-year-old podocarpus and boxwood, and more than 300-year-old five-needled pine trees.

These "living fossils" full of vitality show Rugao's profound cultural heritage.

Since ancient times, Rugao people have attached great importance to environmental greening and the display of indoor bonsai in the courtyard, and it is known as the capital of flower and bonsai in China.

Ordinary farmers in Rugao have "big trees in front, big bamboos in the back, and the main room in the middle." The number of trees they own is regarded as a symbol of wealth. Since ancient times, there has been a saying that "a poor man shows his flesh, and a poor village shows his house."

The land of Rugao is full of vitality and green gardens, which beautify the environment, cultivate the mood, purify the air, and increase the content of negative ions, which is a great enjoyment for people's body and mind.

4. The river has many branches and the water quality is excellent.

Rugao has a dense water network, with crisscrossing river branches and connected with the Yangtze River. It has abundant drinking water sources and excellent water quality.

Rugao people like to drink "Tian Shui" when drinking tea. They also like to use huoxiang, mint, and oxtongue grass (scientific name: Plantago seed) instead of tea leaves to brew for summer. These traditional Chinese medicines have health functions such as removing summer heat and strengthening the stomach.

There are still wells in rural areas, but drinking tap water is common in cities. The "clear spring" project is being implemented in rural areas to popularize drinking tap water.

According to drinking water source survey data over the years, Rugao’s drinking water source compliance rate is 98.5%.

All chemical indicators have always been within the Class I-II standards. Iron, manganese, zinc, selenium and other trace elements needed by the human body are abundant, and trace amounts of manganese and iron exceed the standards.

According to literature, manganese has a lipotropic effect in the human body, and has anti-cancer and anti-aging effects. An appropriate amount of high manganese is beneficial to human health.

5. The soil resources are diverse and the products are rich.

The main source of Rugao soil is the alluvial deposits of the Yangtze River, and is affected by the alluvial deposits of the Huaihe River, making the mineral composition of the Rugao soil parent material relatively complex, laying the foundation for the diversity of soil element composition.

Complex soil resources form Rugao City's rich basic planting resources, laying a solid foundation for the diversity of Rugao City's plant resources.