Hai Fuxing's first step on the accelerator is sometimes very difficult. What should I do?

Regarding the question you asked, first check whether the throttle valve is stuck because of too much carbon deposit when working. If there is too much carbon deposit, it needs to be cleaned up in time; If there is nothing wrong with the throttle, it may be that the throttle line has burrs after long-term use, or the wear resistance of the accelerator pedal shaft is too great after long-term use, resulting in the throttle not returning. You can check from these two aspects.