Chery's refueling feels soft and it can't run. What is the reason?

This situation upstairs is the design of the car itself, but sometimes it depends on your driving skills: shifting gears too early. The speed is too slow, and the result is a weak speed. Because the engine is at a low speed, there is not enough torque to accelerate the car faster. Before shifting gears, only by raising the speed and then raising it by one gear can the engine be kept at a high speed. So there is enough torque to make the car accelerate faster.