Chongyun is a positive individual quite literally, as he has an excess of positive energy in him. Due to this excess in positive energy, he's vulnerable to things that warms him like food, drinks, clothing, the sun, and even blushing. If he is not able to suppress those feelings, he might enter a manic state of being excited, friendly or faint. In extreme cases, he may show extreme signs of irrationality. To counter said positive energy, he light weight clothing and eat cold food.