Why doesn't the old version of the timer work?

The network signal is bad. Timekeeping is a learning timekeeping software. The reason why it can't be used for old timekeeping is because the network signal is not good, and it needs to be reconnected to the network before it can be reused. The software can help users persist in completing their studies and achieve their goals through scientific data analysis, unique learning task groups and mutual supervision and encouragement among classmates.