On December 17, Ji Chaochao Youcai, head of materials technology at Li Auto, addressed concerns over the alleged poor maintainability of "one-piece die casting" in a public statement. He clarified that in the event of front or rear collisions, the one-piece die-cast structure does not directly absorb the impact force. Instead, the vehicle’s safety design incorporates at least three protective layers: the crash beam acts as the first line of defense, the energy-absorbing box serves as the second layer for controlled crushing and energy dissipation, and the longitudinal beam provides a third layer for sustained crushing and energy absorption. These layers work together to effectively resist deformation while efficiently absorbing impact energy within a controlled range. Additionally, external plastic bumpers and foam energy-absorbing blocks offer supplementary protection, further enhancing safety.