增程 is short for
增程式电动车 (zēngchéngshì diàndòngchē, range-extender EV). The car's wheels are always electric-driven; a small gasoline engine acts only as a generator when the battery is low.
理想 (Lǐxiǎng, Li Auto) made this layout famous in China; AITO and Leapmotor (
零跑 Língpǎo) followed.