"We only have one earth, and we choose new energy vehicles for environmental protection." ■ 2-8 layer, high-Tg, high reliability, metal core, high voltage resistance. ■ Hybrid bonding for FR4 and metal. ■ Vacuum etching for uniformed traces. ■ 85% temperature & 85% humidity test. ■ Controlled Anti-CAF. ■ Salt spray test. ■ Graphene is carried by the FPC to heat the battery in cold weather. ■ Low resistance test.