As far as I can tell, the screen of the Mate60 phone does not have a plastic holder. In the design of Mate60, a curved glass screen is used, which requires multiple heat treatments and surface processing in the manufacturing process to achieve better visual effects and feel.
Moreover, the Mate60 mobile phone also uses a metal frame as a support structure, which is relatively stronger and more high-end. Therefore, it is clear that the screen of the Mate60 is not supported by a plastic holder.