Start of summer is the seventh solar term in the 24 solar terms of the lunar calendar and the first solar term of summer when the sun reaches the longitude of 45 degrees.

Summer means that the seasons change and summer is about to begin. It is customary for people to believe that after the Start of Summer, the temperature will rise. The summer heat is coming and thunderstorms will increase. At this time, the average temperature in most parts of the country will be around 18 to 20℃.

After the summer temperature rises, people also tend to be nervous and irritable. Human body and mind will interact with each other through the nervous and endocrine system, immune system and so on. The elderly, especially those suffering from cardiovascular diseases, should guard against the occurrence of myocardial ischemia, arrhythmia and elevated blood pressure caused by mood fluctuations, avoid great joy, great anger and great sadhess, and maintain a relaxed mind, clear spirit and harmony.