Why did Shenzhen stop working these days?

The inquiry website shows that on July 16, 2023, according to the latest news of @ Shenzhen weather, at around 23: 00 on June 16, the municipal meteorological observatory may upgrade the typhoon blue warning to yellow, and the whole city will enter the typhoon defense state. Primary and secondary schools, kindergartens and nurseries should be prepared to suspend classes, and it is suggested that employers should be prepared to stop work. After the typhoon became stronger, Shenzhen issued a notice to stop work, so Shenzhen stopped work because of the typhoon landing.