Trading is an activity that can last for many years. The prerequisite for sustainability is not only methods and funds, but also the balance between trading and life. When trading takes up too much time and attention, emotions spread into life, and judgments will be deformed unconsciously. This article explains how to get rid of the binding of identity and profit and loss, set the triple boundary of time, money and emotions, and recalibrate the state by regularly leaving the market, so that sustainable participation can become the support of long-term trading.