Cardiovascular System

Assess the acute effects of high-temperature exposure (including both daytime and nighttime conditions) on multiple physiological and psychological indicators, including cardiovascular, respiratory, neuropsychiatric, and metabolic functions, along with their potential mechanisms.

This is a randomized controlled human exposure crossover study. Investigators aim to assess the acute effects of low temperature exposure on cardiovascular system and the underlying mechanisms.

The goal of this observational study is to analyze the acute effects of meteorological factors and air pollution on cardiovascular system. The main question it aims to answer is: 1. How do meteorological factors and air pollution affect cardiovascular system? 2. What is the interaction between meteorological factors and air pollution on cardiovascular system? Participants will: 1. Provide their health data obtained in physical examination, including but not limited to blood pressure, blood routine, urine routine and B-ultrasound. 2. agree that the research team will use their personal identification number, gender, age, education level and other information for statistical analysis of the data.