With the increasing prosperity of many emerging markets, people have higher and higher expectations for personal travel. At the same time, the density of vehicles in global cities is gradually increasing. LMC Automotive estimated in 2017 that there are about 1 billion cars on the roads in the world, and this number may reach nearly 1.2 billion by 2018; Trend Force said that although the auto market has gradually weakened since 2018, plus due to the severe impact of the epidemic in 2020, the stocking kinetic energy of major module factories is obviously insufficient. However, the global auto market is recovering in 2021.