The mobile phone received a text message. What happened when Baoding Heavy Industry Company stopped production by 30%?

Baoding launches emergency response to heavy polluted weather: Since June 26th 15, the municipal government has launched emergency response to heavy polluted weather, industrial enterprises have stopped production by 30%, all construction sites have stopped production, and vehicles are restricted to single and even numbers (including Saturday and Sunday), single day and even numbers, and even and even numbers. The warning release time will be notified separately.