In traditional Chinese culture, maintaining social harmony (和谐, héxié) and emotional self-control is highly valued. Publicly displaying strong emotions, especially anger or deep sadness, can be seen as disruptive and immature. This doesn't mean people don't feel these emotions; it just means there's a strong social expectation to manage them privately. This is where 发泄 (fāxiè) becomes crucial. It is the culturally understood process for dealing with emotions that cannot be shown openly. However, it's different from the Western concept of “expressing yourself,” which is often seen as an inherently positive act of authenticity.
发泄 is a common word used in everyday conversation, especially among younger generations who are more open about mental health and stress.