After the concentrated capacity expansion in 2018, VSF industry has entered a relatively stable period. On one hand, the weak market and high pressure of losses were caused by the explosive supply and delayed demand response. In response to this, VSF companies actively sought high value-added products. On the other hand, there was a rapid increase in the focus on environmental protection and sustainable development in end-user market, which led to increased requirements for aspects such as recycling, low carbon emissions, and biodegradability.