Problems of Honda's new Fengrui carburetor with accelerating pump

The throttle pipe with the accelerator pump is separated in the middle of the throttle pipe. The throttle pump only works when the throttle suddenly fills up. It doesn't work if you screw the throttle normally, and it won't work if you add another throttle line (or it's difficult to achieve, but this split throttle line is not difficult to buy). After the throttle line is replaced by the throttle pump, there is basically no effect on fuel consumption, so there is little refueling valve when riding a bicycle. When adjusting the throttle pump pipeline, there is a mark on the black plastic on which the throttle pump hangs the throttle pipeline. When the accelerator is screwed to the bottom, the mark can be aligned with the mark on the bracket.