Wuxi Dong Xi subjects can change gears in 30 yards and 50 seconds and only run for three seconds?

That's right.

The required time of the third gear of the subject has also been updated, and it is stipulated that the speed of running 35 kilometers per hour in the fourth gear should exceed 3 seconds. That is to say, once the gear is in the fourth gear, the speed should not be less than 35 kilometers per hour and the time should last for more than 3 seconds.